brain teasers for problem solving

T he first number is just ONE (amount) "1" (0-9 numeral). So if you say there's ONE "1" (seriously just say it aloud) the next number would be an 11. Then there are TWO "1's", creating 21. Then ONE "2" and ONE "1" which creates 1,211. Then ONE "1", ONE "2", and TWO "1's" creating 111,221 ... and so on.

Source: arsenal7777, Reddit

10. Four people arrive at a river with a narrow bridge that can only hold two people at a time. It's nighttime and they have one torch that has to be used when crossing the bridge. Person A can cross the bridge in one minute, B in two minutes, C in five minutes, and D in eight minutes. When two people cross the bridge together, they must move at the slower person's pace. Can they all get across the bridge in 15 minutes or less?

Explanation: The group of four must follow these steps.

1. First, A and B cross the bridge and A brings the light back. This takes 3 minutes. 2. Next, C and D cross and B brings the light back. This takes another 10 minutes. 3. Finally, A and B cross again. This takes another 2 minutes.

Source: bananaslayer100, Reddit

11. A rebus is a pictogram that represents a word, phrase, or saying. For example, "Ci ii" represents "See eye to eye." What word or phrase does the following rebus represent: O_ER_T_O_?

Explanation : The letters missing in O_ER _T _O_ (OPERATION) spell out PAIN. Thus, "pain-less" operation.

Source: kjivxx, Reddit

12. During a recent census, a man told the census taker that he had three children. When asked their ages, he replied, "The product of their ages is 72. The sum of their ages is the same as my house number." The census taker ran to the man's front door and looked at the house number. "I still can't tell," she complained. The man replied, "Oh that's right, I forgot to tell you that the oldest one likes chocolate pudding." The census taker then promptly wrote down the ages of the three children. How old are they?

Explanation: As Reddit users TT1103 and RedditRage explained, the key to this brain teaser is that the census taker looks at the house number. In other words, she knows the sum of the children's ages.

However, at that point of the riddle, she still can't tell how old the man's children are. Therefore, she has to be stuck between multiple possibilities. To narrow it down further, only two sets of numbers that multiply to 72 share the same sum: (2,6,6) and (3,3,8).

After the man reveals that his oldest child likes chocolate pudding, however, the census taker can differentiate between the two options. That is, only the latter of those two sets has a distinct "oldest" child.

Source: mikebrown_pelican, Reddit

13. You're in a dark room with a candle, a wood stove, and a gas lamp. You only have one match, so what do you light first?

Source: notarobot45, Reddit

14. There are five bags of gold that all look identical, and each has ten gold pieces in it. One of the five bags has fake gold in it. The real gold, fake gold, and all five bags are identical in every way, except the pieces of fake gold each weigh 1.1 grams, and the real gold pieces each weigh 1 gram. You have a perfectly accurate digital gram scale and can use it only once. How do you determine which bag has the fake gold?

Explanation: Take one gold piece from the first bag, two from the second bag, three from the third bag, four from the fourth bag, and five from the fifth bag. If the weight on the scale ends in .1, then you know the first bag has the fake gold. If the weight on the scale ends in .2, then the second bag has the fake gold, and so on and so forth.

Source: dankability, Reddit

PROBLEM SOLVING RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

Solving Problem Riddles

Life's biggest problem riddle.

I am a problem in many peoples lives. At times (even more than once) Im useful. The older I grow, the less useful I become. Who am I?

Problem At The Pool Riddle

Why did the girl have problems at the pool?

The Same Problem Riddle

What did one sailor say to the other when they had the same problem?

Pearl Problems Riddle

Floor math riddle, a goat, a wolf, and a head of cabbage, twin witches riddle, snow boots riddle, the murder at joe's riddle, a farmer crossing a river, a complicated coop riddle, the perfect pill riddle, shipwrecked on a deserted island, locking the mail, new year's jog riddle, add your riddle here.

Team Building Riddles: 17 Fun Examples

You found our list of team building riddles .

Team building riddles are charming brain teasers and puzzles that employees bond over. Generally, team building problem solving riddles are challenging, but not impossible to answer. Since colleagues work together to come up with responses, you can use these riddles to connect and build shared memories.

These riddles are a type of problem-solving challenge and similar to team building puzzles and team building jokes .

Specifically, this list includes:

Let’s jump into it!

List of riddles for team building

Need to lighten the mood before a meeting? From simple wordplay to brain teasers, here is a list of team building riddles and answers.

Q1. “A cowboy rides into town on Friday, stays for three days and leaves on Friday. How did he do it?”

A1. The horse’s name is Friday.

Source: Riddles Brain Teasers

Q2. “A man is going towards a field. He knows he will die when he gets there. What is the situation?”

A2. His parachute is broken.

Source: esl-lounge.com

Q3. “What is it that everybody does at the same time?”

A3. Grow older.

Source: Tricky Riddles

Q4. “A man lives on the 10th floor of an apartment building. Every morning he takes the elevator all the way down to the bottom and goes to work. In the evening, when he comes back from work, he gets into the elevator, and if there is someone else in it, he goes back to the 10th floor. On rainy days he also goes directly to his floor. On all other days, he goes to the 7th floor and walks up 3 flights of stairs to his apartment. Why?”

A4. He is very short, so he can’t reach the upper elevator buttons. However, he can ask people to push the buttons for him. He uses his umbrella to push the buttons on days when it rains.

Source: English Language Centres

Q5. Two fathers and two sons go fishing. They each catch a fish and return with three fish only why?

A5. There are three men: A grandfather, a father (the grandfather’s son) and the father’s son.

Source: RepublicWorld

Q6. “What kind of coat is always wet when you put it on?”

A6. A coat of paint.

Source: PepUpTheDay.com

Q7. “A murderer is condemned to death. He has to choose between three rooms. The first is full of raging fires, the second is full of assassins with loaded guns, and the third is full of lions that haven’t eaten in three years. Which room is safest for him?”

A7. The third room, because the lions haven’t eaten in three years, so they are dead.

Source: Brainzilla

Q8. “What disappears as soon as you say its name?”

A8. Silence.

Source: DoYouRemember?

Q9. “Each morning I appear to lie at your feet. All day I will follow, no matter how fast you run. Yet I nearly perish In the midday sun. What am I?”

A9. Shadow.

Source: Brain Teasing Riddles

Q10. “Here on earth it is true, yesterday is always before today; but there is a place where yesterday always follows today. Where?”

A10. A dictionary.

Source: Riddles.com

Q11. “What has a face and two hands but no arms or legs?”

A11. A clock.

Source: Riddle Me Daily

Q12. “Until I am measured, I am not known. Yet how you miss me when I have flown. What am I?”

Q13. “What comes once in a minute, twice in a moment, but never in a thousand years?”

A13. The letter “m”.

Source: Good Riddles Now

Q14. “What turns everything around, but does not move?”

A14. A mirror.

Q15. “Young John Kennedy was named after me. Yet my name is neither John nor Kennedy. How can that be?”

A15. John Kennedy was born later than I. Therefore, he was named after me.

Source: BreakAppz

Q16. “If there are three apples, and you take away two, how many do you have?”

A16. The two you took.

Source: Riddles.net

Q17. “A taxi driver is going the wrong way down a one-way street. He passes four police officers, yet none of them stop him. Why?”

A17. The taxi driver was on foot.

Source: Genius Puzzles

Final Thoughts

Riddles are a great way for your team to exercise their brains. To maintain morale and break up the monotony of work life, use the riddles on this list as an effective tool to brighten your team’s day and get everyone thinking.

Next, check out this list of icebreaker jokes , these workplace riddles , and this collection of problem solving books .

FAQ: Team building riddles

Here are some frequently asked questions about riddles for team building.

What are riddles for team meetings?

Riddles for team meetings are brain teasers or puzzles that are work appropriate. When told well, riddles for team building can kickstart your meeting on a high note.

What are the best icebreaker riddles for meetings?

The best icebreaker riddles for meetings are amusing and elicit reactions from your team. The riddles should be challenging and logical, so your team feels entertained.

What are some funny riddles for the workplace?

Some funny riddles for the workplace include:

Author: teambuilding.com

Content Expert at teambuilding.com. teambuilding.com is a leading authority on team building and engagement at work. We are a little obsessed with company culture.

Want to do team building online?

We have 30+ experiences to choose from, and thousands of five star reviews.

Critical Thinking and Decision-Making - Using Brain Teasers to Build Critical Thinking Skills

Critical thinking and decision-making -, using brain teasers to build critical thinking skills, critical thinking and decision-making using brain teasers to build critical thinking skills.

Critical Thinking and Decision-Making: Using Brain Teasers to Build Critical Thinking Skills

Lesson 4: using brain teasers to build critical thinking skills.

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Using brain teasers to build critical thinking skills

Here's a brain teaser: A rooster is on the roof of a barn facing east. The wind is blowing to the west at 10 miles per hour. The rooster lays an egg. Which direction does the egg roll?

The answer appears below the image.

an illustration of a rooster on the roof of a barn with an egg at its peak

Answer: There is no egg. The rooster didn't lay one because roosters are male. Did you get it right? Let's pick this apart and see why so many people have difficulty with this brain teaser, and so many others.

Watch the video below to learn more about how you can use brain teasers to improve your critical thinking.

The answer is in the details

It's easy to overlook details or accept them without questioning. In the brain teaser above, the answer could be found in the second word: r ooster .

an illustration of a rooster looking for an egg in its nest

In hindsight, we realize it's impossible for roosters to lay eggs. But it's easy to overlook this when it's casually mentioned in the brain teaser.

Misdirection

Another process at work in this brain teaser is misdirection . There were several details included that we may have paid too much attention to: The fact that the rooster was facing east, and that the wind was blowing west at 10 miles per hour.

an illustration of a rooster facing east and the wind blowing west at 10mph

In the end, these details had nothing to do with the actual answer. However, they seemed important in the context of the brain teaser! This directed us away from the relevant information.

Applying these ideas to the real world

The same techniques we use to solve brain teasers can also be applied to real-world situations . When you're trying to figure something out, it's important to analyze the information that's available to you and ask the following questions:

an illustration of someone asking themselves questions

Brain teasers not only help to keep your mind sharp, but can help improve your critical thinking skills as well.

Let's finish things off with another brain teaser...

You are in a dark room with a single match. The only objects available to you are a candle, an oil lamp, and a gas stove. Which item do you light first?

illustration of a dark room with a candle, an oil lamp, and a gas stove

Answer: The match!

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From our blog

45 Fun and Clever Brain Teasers for Kids with Answers!

Reviewed by Sarah Tino, M.Ed.

Engage and motivate your students with our adaptive, game-based learning platform!

Math brain teasers for kids

Sometimes keeping your students engaged during a (long) school day feels like a losing battle. How do you gain their full attention while teaching the skills they need to succeed? How do you turn tough and intimidating concepts into fun, entertaining lessons that actually spark life in the classroom?

Brain teasers for kids are a great form of game-based learning that not only entertain children but also inspire some creative thought in the classroom. People of all ages can indulge in these playful — yet challenging — activities.

And some examples of when teachers might want to use brain teasers are on a bulletin board in the classroom, as a partnered activity to start a new concept or lesson, or during a rainy day indoor recess box.

We’ve gathered 45 examples of brain teasers for kids with answers, organized by category:

Table of Contents

Language brain teasers for kids :

Riddles ; Language associations ; Lateral thinking problems.

Math brain teasers for kids :

Math riddles ; Pattern problems ; Prodigy.

Visual brain teasers for kids :

Spot the difference ; Rebus puzzles ; Optical illusions ; Stroop effect test.

Use the list below to find the perfect brain teaser for your class!

What are brain teasers?

Before you explore our examples, you might be wondering what brain teasers actually are.

Cambridge Dictionary defines a brain teaser as “a problem for which it is hard to find the answer, especially one which people enjoy trying to solve as a game.”

Brain teasers are a type of puzzle — and as the list below reveals, they come in many different forms. Often presented as a riddle, question or activity, brain teasers require a little extra brainpower to solve.

It's important to note that if you have any English language learners in your class, brain teasers for kids might pose a challenge for them. If that's the case, they might need you to walk them through the brain teaser more closely, or you can find ones that better suit their language level.

Brain teasers for kids differ from other complex or abstract problems because they’re usually done for fun. Although you can use them to analyze problem-solving and critical thinking skills, they’re often used as an amusing activity to encourage logical and lateral thinking , or thinking “outside the box.”

45 Brain teasers for kids

We’ve compiled a list of language, math and visual brain teasers to get your students thinking. Get inspired by the examples below — including answers!

Language brain teasers for kids

When you hear the term “brain teaser,” a riddle is likely the first thing that comes to mind. Riddles are perplexing — sometimes misleading — questions or statements that require creative thought to solve.

Riddles are usually fun, and plenty of them can add some humour to your classroom.

Enjoy our list of riddles for kids below!

a) Billy’s mother had five children. The first was named Lala, the second was named Lele, the third was named Lili, the fourth was named Lolo. What was the fifth child named?

b) Choose the correct sentence: “The yolk of the egg is white” or “the yolk of the egg is white.”

c) It’s as light as a feather, but the strongest person can’t hold it for more than five minutes. What is it?

d) The more there is, the less you see. What is it?

e) What gets more wet while it dries?

f) You can find it in Mercury, Earth, Mars, Jupiter and Saturn, but not in Venus or Neptune. What is it?

g) It likes food, but water kills it. What is it?

h) What’s full of holes but can still hold water?

i) Which is heavier, a pound of feathers or a pound of rocks?

j) How far can a dog run into the woods?

k) You’re driving a city bus. At the first stop, three women get on. At the second stop, one woman gets off and a man gets on. At the third stop, two children get on. The bus is blue and it’s raining outside in December. What colour is the bus driver’s hair?

l) There are three houses. One is red, one is blue and one is white. If the red house is to the left of the house in the middle, and the blue house is to the right of the house in the middle, where’s the white house?

m) It’s at the center of gravity and you can find it in Venus, but not Mars. What is it?

n) What goes on four feet in the morning, two in the afternoon and three in the evening? (This is from the classic myth, Oedipus and the Riddle of the Sphinx )

o) What travels faster: heat or cold?

p) A man was walking in the rain in the middle of nowhere without a coat or an umbrella. He got soaked, but not a single hair on his head was wet. How can this be?

q) A cowboy rode into town on Friday. He stayed in town for three days and rode back out on Friday. How is this possible?

b) Neither. Egg yolks are yellow, not white!

f) The letter “R”

h) A sponge

i) Neither. Both weigh a pound!

j) Halfway. Once it reaches halfway, it’s running out of the woods.

k) Whatever colour your hair is. Remember, you’re driving the bus!

l) In Washington, D.C.

m) The letter “V”

n) A human. The times of day represent stages of human life. At the beginning of life, a baby crawls on four “feet.” As a person gets older, they walk on two feet. Later in life, a person will walk on three “feet” (two feet, plus a cane to help them walk).

o) Heat travels faster because you can catch a cold!

p) He was bald.

q) The horse’s name was Friday.

As a bonus, use these riddles to challenge preconceived notions and get students thinking about natural bias .

a) Two boxers are in a match scheduled for 12 rounds. (Pure boxing only - no kicking, UFC takedowns, or anything else). One of the boxers gets knocked out after only six rounds, yet no man throws a punch. How is this possible?

b) A father and son have a car accident and both are very injured. They are taken to separate hospitals for treatment. When the boy is taken in for an operation, the surgeon says, “I can’t do this surgery…. this boy is my son!” How is this possible?

a) The two boxers are women.

b) The surgeon is the boy’s mother.

2. Language associations

These brain teasers for kids explore the complexities of the English language. Use them to boost student knowledge of sounds, words, spelling, categorization and more.a) Word association : find a word that associates with the following sets of words.

b) Find the mystery word . Replace the third letter of each word with a new letter to create a different word. When read vertically, the new letters will reveal the mystery word.

For example, the word MA K E could become MA R E, MA L E, MA T E and so on. It’s your job to figure out which one works to create the mystery word.

Hint: It’s something you’ll find outside.

c) Find rhyming pairs . Unscramble the words below so that each pair of words rhymes.

Mystery word: FLOWER

You can also use printable brain teasers for kids like this one:

Image source: Spelling Words Well

Answer: The “happy word” is SMILE.

3. Lateral thinking problems

Lateral thinking problems require creative thinking with an indirect approach.

These questions require logic and careful thought to solve. The most notable example of a lateral thinking problem is the classic Monty Hall problem .

Here are two examples of lateral thinking problems kids can try to solve.

a) The river crossing problem

Image source: Popular Mechanics

A farmer is travelling with a fox, a goose, and a bag of beans. During his journey, he comes across a river with a boat to cross it.

The farmer can only fit one thing in the boat with him at a time. If left alone together, the fox will eat the goose or the goose will eat the beans. How does the farmer get everything across the river safely?

b) The light bulb problem

There are three light switches outside of a room-- labeled number one, number two, and number three. The door to the room is closed and you can’t see in. All three switches are off.

You need to figure out which switch belongs to which bulb. You can use the switches however you want to, but can only enter the room once. How do you do it?

a) Here’s the step-by-step solution:

b) Turn on the first switch and leave it on. Turn on the second switch for a few minutes, and then turn it off again. When you enter the room, one light bulb will be on. You’ll know it goes with switch one because you turned it on. Another bulb will be hot. You’ll know that goes with switch two because it was on for a little while. The bulb that’s off and cold goes with switch three because you didn’t touch it.

Like math puzzles , these brain teasers for kids can increase engagement with math content and inspire your students to work on math concepts and problems outside of regular lessons.

1. Math riddles

These riddles are just as amusing as the ones above, but they’re math-focused . Use them to give students some extra math practice and encourage resourceful thinking.

Math riddles

a) Divide 30 by ½ and add 10. What’s the answer?

b) A clerk at the butcher shop is six feet tall and wears size 10 shoes. What does he weigh?

c) A farmer has 19 sheep on his land. One day, a big storm hits and all but seven run away. How many sheep does the farmer have left?

d) Your sock drawer only contains 18 white socks and 18 blue socks. How many times do you need to reach inside the drawer and take out a sock to guarantee a matching pair?

e) You planted sunflower seeds in your back garden. Every day, the number of flowers doubles. If it takes 52 days for the flowers to fill the garden, how many days would it take for them to fill half the garden?

f) Using only addition, how can you use eight eights to get the number 1,000?

g) When Ashley was 15, her mother was 37. Now, her mother is twice her age. How old is Ashley?

a) It's 70. You’re dividing 30 by ½, not by two. Thirty divided by ½ is the same thing as multiplying it by two, which is 60. Plus 10 makes 70!

b) Meat. He works at the butcher shop, so he weighs meat for a living.

c) Seven. The riddle says all but seven run away, meaning there are seven left who didn’t.

d) Three times. On the third time, you’ll get either a white or a blue sock to match with one of the other two you’ve already grabbed.

e) It would take 51 days. If the number of flowers doubles every day, half the garden would be full the day before, on the 51st day.

f) 888 +88 +8 +8 +8

g) Ashley is 22. Her mother is 22 years older, so when Ashley is 22, she’s now half her mother’s age.

2. Pattern problems

These questions require students to identify a pattern before they can answer a particular question. Kids must use creative and logical thinking to find the answers.

4 + 4 = 168

5 + 5 = 2510.

b) What makes this number unique: 8,549,176,320?

c) Solve the pattern puzzle below. Find the missing number to replace the question mark.

Image source: Genius Puzzles

d) Solve the following:

Image source: AOL

a) The missing number is 3612. The answer is the number multiplied by itself and then the number added to itself. Six multiplied by six is 36, and six plus six is 12.

b) It contains each one-digit number, zero through nine, listed in alphabetical order.

c) The missing number is 17. Each number in the circle is the sum of the numbers in the opposite quadrant. In this case, the numbers are eight and nine — added together makes 17.

d) The answer is 14 (or 16), if you’re on the other side of the debate .

3. Prodigy Math Game

This math activity is a bit different from others on the list. It’s not a traditional brain teaser, but it can also be used as a fun, skill-building alternative to traditional math class.

Prodigy is a game-based learning platform that takes your students on an online fantasy adventure while they answer standards-aligned math questions. It’s engaging and effective at teaching necessary skills.

Prodigy's free teacher tools help you differentiate learning, send assessments in-game and even collect student insights!

Visual brain teasers for kids

1. spot the difference.

Here’s an example of a printable spot the difference activity.

Image source: Tim’s Printables

2. Rebus puzzles

A rebus is a visual word puzzle that uses lateral thinking to find its intended meaning. The word or phrase is depicted with a visual illustration, including letters and words. Students must think creatively to figure out the meaning from the clues they’re given.

Image source: Wikipedia

Image source: Stack Exchange

a) Top secret

b) Think outside the box

Visit the link below if you want more fun rebus puzzles for your students:

3. Optical illusions

Get tricky with your students! Optical illusions use visual tricks that alter the perception of what you’re really seeing. Students will love trying to figure out what’s really going on in these examples.

a) How many legs does the elephant have?

Image source: Optics For Kids

b) Are the two squares different colours?

Image source: Brain Den

b) They’re exactly the same colour. If you place your finger over the spot where the squares meet, you can see they’re the same. Try this impossible paper puzzle if you want a more hands-on optical illusion. You can make one to show your class, then have students make their own as a fun brain teaser to show friends and family.

4. Stroop effect test

The Stroop effect was discovered in the 1930s by John Ridley Stroop. During the test, you’re given a list of colour names, with each word being a different colour than what they describe.

The test involves saying the colour of a word, rather than reading the word itself. Your mind must process the two conflicting pieces of information, which slows down reaction speed and requires careful thought to get through.

Image source: The Crafty Classroom

Benefits of brain teasers for kids

You know your students enjoy them, but did you know there are plenty of additional reasons to make brain teasers a regular activity in the classroom?

A study on the attention spans of six-year-olds found children who were given brain teasers were more attentive than those who were not — showing brain teasers were effective at boosting children’s attention spans.

Brain teasers for kids can also:

How to use brain teasers in the classroom

In addition to their many learning advantages, brain teasers are a great way to break up the day and engage your students. Here are just a few ways you can use brain teasers for kids as a teaching strategy and maximize the benefits in your classroom:

Final thoughts on brain teasers for kids

No matter what subject or skill you want to focus on, a brain teaser is a great addition to traditional teaching methods. Plus, it’s something students will actually be excited to do.

Remember that brain teaser are designed to be fun for kids. it’s not about finding the right answer, but the mental exercise they get from trying to find the solution.

Use any of the brain teasers in this list whenever you need a boost of energy in your classroom. Bonus points if you can stump any adults!

Create or log in to your free teacher account on Prodigy – a game-based learning platform for math that’s easy to use for educators and students alike. Aligned with standards across the English-speaking world, it’s used by more than a million teachers and 90 million students.

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Puzzles and Riddles That You may Find Interesting

It is a growing list of puzzles and riddles that I felt attracted to and solved. The puzzles belong to all major categories. Each puzzle is divided into two parts - the puzzle and its solution.

A solution focuses on each little step of thought that leads to the solution. And it relies heavily on problem solving strategies and techniques as well as reasoning . Reasoning is my favorite topic - there is so many types and forms of reasoning!

Problem solving techniques are merrily used. But these days, that is during last part of 2021, I favor Question, answer and analysis technique to crack many hard nuts.

Enough of monologue. Go ahead. Taste for yourself. Who is not fond of challenging brain teasers!

Quick jump links to the categories are,

Mathematical puzzles

Logic puzzles, river crossing puzzles, ball weighing puzzles.

Matchstick puzzles.

Just click on any of the above links to go through the particular category chosen and to return click on your browser back button.

These are the puzzles that I couldn't categorize comfortably. Usually a riddle is small having a small number of key mysteries to unravel. But you will find some of the riddles not easy to conquer.

Two jugs riddle

The tramcar reunion riddle

Riddle of 4 persons crossing a bridge over a river at night

Three boxes riddle

Riddle of PROBLEMSOLVING - Creation and application of Repetition pattern based technique

Airplane riddle of flying around the world

Riddle of lying and truth-telling twins

Two jugs riddle of delivering 1 quart of milk each

How could Sonia sell half a poodle riddle

Transfer a pile of 15 numbered discs riddle

Two burning ropes timer riddle

Riddle of four coins touching

Pick up in turns riddle

Devotee and three temples riddle

Big game hunting riddle: How many animals were bagged?

Knight and calculator keypad riddle

Riddle of all around handshakes in a dinner party

Open the lock riddle with 682 in clues

Connect the nine dots riddle: step by step solution

Open the lock riddle with 154 in clues

Number lock puzzle: Can you crack the code?

Two circles and a line riddle: can you traverse?

The ten barrel face number puzzle

Stepping stone crossing riddle step by step solution

Odd numbered and even numbered piles riddle

Make a circular chain riddle

Catch the cat hiding in 5 boxes riddle

4 digit number lock riddle: Can you crack the code

Remove discs from 10 touching discs riddle

Each of these puzzles is predominantly math heavy. Some amount of math you would surely need to solve a puzzle of this category.

But I have taken special care to keep the math simple (simply because I don't know complex math). Even such a hard one like Monkey and coconuts I have solved using Class ten level math that should be understood by most if not all.

Reverse cheque puzzle

Reverse cheque puzzle solution

Counting eggs puzzles based on Euclid's division lemma

Monkey and the coconuts puzzle with solutions

10 digit Conway number puzzle with solution

World's Hardest Easy Geometry Puzzle Solved with Techniques Explained Step by Step

Hard Algebra Puzzles Solved by Basic Exponent Concepts and Reasoning

Three squares in a triangle puzzle

3 digit number math puzzle

9 squares in a rectangle math puzzle

How many addition signs needed to make sum of 99

Solve 3 puzzles by solving only one: Domain mapping

Minimum number of heads with same number of hairs riddle

Playing card math puzzle

Change money math puzzle

Sharing a bicycle puzzle step by step solution

Ship carpenter's problem of plugging a square hole puzzle

Half and half money math puzzle

What is the weight of the fish?

The archery match math puzzle

The cat and mouse game with advisor dog

The puzzle of a purchase in the local market

Just like math puzzles, these are logic heavy. I mean heavily dependent on formal logic that involves truth, falsity, implications and so on.

Though logic is a part of math only, in puzzles, logic demands a separate category. These are especially interesting.

Method based solution to Einstein's logic analysis puzzle, whose fish

How to solve Einstein's puzzle whose fish confidently, improved method based solution

Logic puzzle, When is Cheryl's birthday

Liar and truth-teller riddle with step by step easy solution

4 Prisoners and Hats Puzzle

Liar, Truth-teller, Random-answerer riddle

Flipping coins to heads or tails logic puzzle

Six wrong labeled bottles logic puzzle

Riddle of Name of the Engineer

Who wears which shirt color logic puzzle

Whose birthday on which day logic puzzle

4 logicians and 11 fish fries logic puzzle

This category has a small number of puzzles but these are highly popular and engaging ones.

Farmer with fox, goose and bag of corn crossing the river puzzle

Two pigs and two hens crossing river puzzle

3 monkeys and 3 humans crossing river puzzle

King queen minister washerman river crossing puzzle

This is also a small category with only a few puzzles. But again these are of a kind as the saying goes.

None of these are easy to solve, but again not too hard to understand the solution also.

Find the heavier among 8 identical balls in 2 weighing puzzle

Find the fake ball among 8 identical balls in 3 weighing puzzle

Find the fake ball among 9 identical balls in 3 weighing puzzle

Find the fake ball among 12 identical balls in 3 weighing hard puzzle with solution

Matchstick puzzles

This is my favorite category and I always keep a large box of matchsticks within reach to play with when I feel the need.

It is a wonder how many engaging creations can be made with these innocuous little sticks!

Solution to 6 triangles to 5 triangles in 2 moves, first matchstick puzzle

Matchstick puzzle 5 squares to 4 squares in 2 moves

Matchstick puzzle 5 squares to 4 squares in 3 moves

Matchstick puzzle, Turn around the fish in 3 moves

Fifth Matchstick puzzle, Move 3 sticks in tic-tac-toe figure to form 3 perfect squares

Hexagonal wheel to 3 triangles by removing 4 sticks

Convert 5 squares to 4 squares in 3 stick moves, third 5 square matchstick puzzle

Matchstick Puzzle - Make the kite nose-dive in 5 stick moves

Make 5 squares from 6 in 2 stick moves - 6 square matchstick puzzle

Move 3 sticks and convert 5 squares to 4 squares in 4th 5 square matchstick puzzle

Move 3 sticks and convert 4 squares to 3 squares matchstick puzzle

Move 8 sticks and convert 5 squares to 2 squares matchstick puzzle

First Move 3 sticks and make 2 squares matchstick puzzle

Second Move 3 sticks and make 2 squares matchstick puzzle

Remove 2 matchsticks to leave 6 triangles puzzle

Add 3 matchsticks to make 4 triangles - lateral thinking stick puzzle

Move 1 stick to make 4 closed shapes each with 3 or 4 sides

Move 2 sticks to make 5 closed shapes matchstick puzzle

Move 2 to make 7 squares matchstick puzzle - solution based on problem solving and innovation model

Move 4 to turn the tower upside down Matchstick puzzle

Move 2 matches to make 6 squares and move 8 matches to make 6 squares - a pair of matchstick puzzles

Move 3 matches to take the cherry out of wine glass and move 2 matches to take the cherry out - a pair of matchstick puzzles

Move 6 matches to make 5 squares

Move 2 matches and add 1 to make 2 diamonds puzzle

Move 4 matches to make 5 triangles matchstick puzzle

Remove 4 matches to leave 4 equal triangles puzzle

Transfer 1 match in two matchstick groups puzzle

Move 3 matches to make 5 equal squares puzzle

Matchstick puzzle move 4 to make 10 squares

Matchstick puzzle Move 2 for form 11 squares

Move 2 matches to make 3 triangles

Remove 3 matches to leave 3 triangles

Add 9 matches to make 8 nodes

Move 3 matches to make 7 squares matchstick puzzle

Move 4 to make 6 squares matchstick puzzle

Move 4 matches to form 3 square area

Move 4 matches to make 4 squares matchstick puzzle

Move 2 matches to form 4 equal squares matchstick puzzle

Move 3 matches to create 3 squares of different sizes

Matchstick star puzzle - Move 2 matches to form 6 triangles

Move 2 matches to form 5 triangles from 6 triangles puzzle

Remove 3 and move 2 matches to form 3 squares puzzle

Enclose maximum number of triangles by 9 matchsticks

Remove 4 matches to leave 6 diamonds matchstick puzzle

Turn around the face of the pig in 2 moves puzzle

Add 10 matches to create 5 diamonds matchstick puzzle

Move 3 matches of 6 squares to create 5 squares puzzle

Turn the Westerly fish to Southerly swimming fish in 2 moves

Remove 5 matches to leave 5 squares matchstick puzzle

Move 4 matches to make 6 triangles matchstick puzzle

Remove 6 matches to leave exactly 2 squares puzzle

Move 3 matches to form 6 squares matchstick puzzle

Move 3 Matches to Form Exactly 3 Rectangles Puzzle

Move 4 matches to leave 2 triangles matchstick puzzle

Move 3 sticks to form six squares matchstick puzzle

Move 3 matches to form 2 large and 1 small triangle puzzle

Tricky brain teaser challenges you to find 'odd' letter within 13 seconds

Apparently only those with a 'high IQ' can solve the problem and spot the odd letter amongst the X's and K's.

Can you spot the hidden letter amongst the Xs and Ks?

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Brain teasers are an excellent way to test out your observational skills and help you focus better. So if you've started the week off struggling to concentrate at work, then this puzzle could be exactly what you need to get you back on track.

Not only do they aid your focus, but they're also great at testing your problem solving abilities - and sharing them with family and friends is ideal for a bit of healthy competition to see who can solve it the fastest.

The Mirror reports that JagranJosh has recently shared a tricky brain teaser that challenges you to try to identify a hidden letter among the Xs and Ks.

If that doesn't sound like it'll be difficult enough, there's also a time limit of 13 seconds - and it's said that only people with "high IQ's" can crack the puzzle in that amount of time. In the brain teaser, there are five rows of Xs and Ks, and you'll need to scan all the rows and columns quickly to be able to find the answer.

Can you find the odd letter within the time limit? If you need help, you can see the answer below – but stop scrolling unless you want spoilers.

Tracking Health and Wellness Applications of Brain Science

Brain Teasers, Puzzles and Games for Teens and Adults

It is always good to learn more about our brains and to exercise them! .

Fun teasers on how our brains and minds work:

2. You say you can count? Check out this brief attention experiment

3. Test your stress level

4. Guess: Are there more connections in one human brain or leaves in the whole Amazon?

Challenge your cognitive abilities with these brain teaser games:

5. Quick brain teasers to flex two key mental muscles

6. Count the Fs in this sentence

7. Can you identify Apple’s logo?

Visual illusions:

8. Ten classic optical illusions to trick your mind

9. What do you see?

10. Fun Mental Rotation challenge

11. What is going on with these pictures?

Language and logic mind teasers:

12. Which way is the bus heading ?

13. Where do words go?

14. Join this party for polyglots

15. Fun & Brainy Haikus . Yours?

A few visual workouts to challenge your mind:

16. Is a circle a circle?

17. Less obvious than it may appear

18. How many…

How’s your pattern recognition?

19. Proverbs to exercise your memory and reasoning

$Math Brain Puzzles$

21. Good puzzle for the whole brain: The Blind Beggar

22. Find the the Really, Really, Really Big Number

Fun brain teasers for the workplace:

23. Please consider Linda ’s job prospects

24. A few guesstimations often used in consulting and tech interviews

25. How many golf balls can fit in a school bus?

Reading & Writing

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Early Literacy

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More Early Literacy

Punctuation

Subjects and Predicates

More Grammar Worksheets

Spelling Lists

More Spelling Worksheets

Chapter Books

Animal (Vertebrate) Groups

Animal Articles

Butterfly Life Cycle

Electricity

Matter (Solid, Liquid, Gas)

Simple Machines

Space - Solar System

More Science Worksheets

Social Studies

More Holiday Worksheets

Puzzles & Brain Teasers

Brain Teasers

Logic: Addition Squares

Mystery Graph Pictures

Number Detective

Lost in the USA

More Thinking Puzzles

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Worksheet Generator

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Brain Teaser Worksheets

These printable brain teasers will help build vocabulary, creative thinking and logic skills. They're great for kids who need an extra brain-charged challenge.

Word Challenges

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Rebus Puzzles

Visual-spatial challenges, number challenges.

Addition square mathematical logic puzzles

Use the clues to determine the mystery object.

Read the clues and figure out the secret number.

On these printable math worksheets, students will use a cypher key to decode the numbers on math problems.

What state is Penelope Peabody visiting? Use the clues to determine her location.

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67 consulting brain teasers with answers.

67 Consulting Brain Teasers With Answers

Consulting case interviews can include full cases as well as brainstorming, estimation, brain teasers etc. So, what is a brain teaser? The definition of brainteaser is “a puzzle or problem whose solution requires great ingenuity.” In other words, a brain teaser is a short riddle designed to challenge your ability to think logically and make not immediately obvious connections. And your ability to solve a brain teaser gives an indication to the interviewer about how flexible your mind is and if you can think logically. Additionally, it can indicate if you give up easily when you encounter a difficult problem, quality firms certainly don’t want in future consultants.

Before we dive into various types of brain teases, and then 67 brain teasers and answers, we would like to share with you an interactive download we prepared for you as a gift, based on FIRMSconsulting book on brain teasers for consulting, banking, and tech interviews. This download includes 20 brain teasers not covered in this article, including explanations on how to approach solving each of those brain teasers. You can get a link to download your copy below. It is completely free. Enjoy!

FREE GIFT #1 BONUS TUTORIAL DOWNLOAD – 20 Brain Teasers With Answers And Explanations: CLICK HERE

Brain teasers as part of your consulting case interview preparation.

So, as is clear from the above, brain teasers should be a part of your case interview preparation. It helps to keep your mind sharp and helps you develop a habit of solving problems calmly and confidently, but with a sense of urgency. And the most important part of solving a brain teaser is how you approach a problem. Just blurting out a correct answer because you already heard a particular brain teaser before will not win you points. Similarly, giving an incorrect or illogical answer or arguing with the interviewer saying your answer is correct will also usually hurt you.

For example, imagine the brain teaser interviewer gives you is as follows. “It’s dark in your room. You have a lot of white socks and black socks in your drawer. You want to get a matching pair, but socks are not organized. All socks are identical except for the color. What is the minimum number of socks you need to take to get a matching pair to wear?”

Now imagine you say, “I would say two. The task is to find a minimum number of socks. A minimum number of socks could be as followed. The first sock you get is black, the second sock you get is black. Similarly, the minimum number of socks could be the first sock you get is white, the second sock you get is white.”

This is the actual answer we got from one of the members of FC community. This answer is incorrect.

If you try to push for it you will fail. The question is, “What is the minimum number of socks you need to take to get a matching pair to wear?” You need to read between the lines. In other words, “What is the minimum number of socks you need to take to guarantee you get a matching pair to wear?” The correct answer to this question can be found below in brain teasers with answers section.

Types of consulting brain teasers

What are some types of brain teasers I can expect during a case interview?

The Estimation teaser or “How Many” Brain Teaser:

Another type of brain teaser, known as an estimation teaser or the “how many” brain teaser, is especially common in the world of management consulting interviews, and it’s a skill consultants will use in their careers. Many of the techniques we use to solve and teach estimation cases were developed by FIRMSconsulting, based on our years in management consulting. Examples of these types of questions are practically infinite: “How many marbles can you fit in a standard Subaru?” “How many boxes of tissues were sold in the average American pharmacy in 2019?” “How many driver’s licenses does Wisconsin allocate in a typical summer?” One of the most common questions from this category is “How many gas stations are there in the U.S.?” You get the idea.

These teasers can leave you entirely stumped. After all, how are you meant to determine answers when you’ve been given no solid data to work with? They can feel like non-starters, but that isn’t the case at all. Estimation teasers are one of the most important types of all because they’re the best at showcasing how you go about solving problems. The answer is not as important as the approach you use, the assumptions you made and how you test the final answer. There is a lot to teach here. Their lack of definite answers is exactly what makes them so valuable; there’s no way to cheat your way around them or to land a correct solution out of sheer good luck. As a matter of fact, the people who are asking you questions like this almost certainly don’t know the answers themselves. Because of this, you won’t find any estimation teasers in this post.

Estimation brain teasers require an exchange of ideas by nature, between the interviewer and interviewee, something which a written page cannot accurately replicate. Any attempt to condense the solution to an estimation teaser into one small paragraph would defeat its purpose entirely.

Refer to estimation cases in The Consulting Offer (for example The Consulting Offer, Season 1, with Felix ) to learn how to answer these questions. You can enroll to receive access to all programs on StrategyTraining.com by becoming an Insider (Insider status is granted when you become an annual Premium member ). Your ability to answer this type of question during consulting case interviews is crucial. This type of question may be asked separately or as part of a full business case.

Though we won’t explore this type of brain teaser any further in this post, try to practice them regularly on your own. Even outside of the consulting world, they’re some of the most useful mental exercises that you can perform.

If you need more details on how to solve estimation cases, we would like to share with you a comprehensive estimation cases guide download we prepared for you as a gift, based on FIRMSconsulting book on how to prepare for consulting case interviews. This download includes a step by step guide on how to solve estimation cases, including a detailed example with an answer. You can get a link to download your copy below. It is completely free. Enjoy!

FREE GIFT #2 BONUS TUTORIAL DOWNLOAD – A Comprehensive Estimation Cases Guide: CLICK HERE

The math brain teaser, math puzzles and math riddles:.

Examples of mathematical brain teasers are probability questions. This barely qualifies as a brain teaser since it tests your math skills vs. your critical thinking and problem-solving ability.

Mathematical brain teasers can be intimidating, but they’re usually relatively straightforward in nature, even if they don’t initially seem to be. If you do a real deep dive, you’ll find some that require an extensive array of equations, formulas, and calculations in order to reach their solution.

On the other hand, the simpler, less specialized ones tend to focus on probability.

Interestingly, mathematical teasers can be a little difficult to identify since they often don’t involve numbers outright, whereas other types of brain teasers occasionally do. This can be a good thing since it encourages you to approach the problem with an open mind rather than an assumption that you’re going to have to adhere to tried and true math-solving techniques.

These days, most people associate math with subjects like computer science, but it’s important to remember that it didn’t start that way. At its core, the system of mathematics is designed to help us understand functions of the natural world, not to overly complicate them. When it comes to brain teasers, math is your friend!

The Riddle Brain Teaser:

In such a brain teaser the interviewer gives you particular problematic situation and asks you to find a solution. Riddles are the type of brain teaser that most requires you to think in an unconventional manner. They typically feature language that tries to misdirect you and often involve words and phrases that don’t mean what they initially appear to. These tend to be the most difficult type of teaser since they’re the ones that most aggressively push you out of your comfort zone. They can also be the most rewarding; there are fewer things more satisfactory than coming up with a single simple solution to a riddle that first seemed impossible.

One example that will appear later below is the following: “If a plane crashes directly on the border between the U.S. and Mexico, where will the survivors be buried?” Another example is a question about a farmer, fox, carrot and rabbit below.

When solving a riddle, the most important thing that you can do is identify it as just that—a riddle. Once you recognize that a question is most likely trying to trick you, you can be much more wary, and thereby avoid falling into its traps. Each word in a riddle tends to be carefully considered so be sure not to overlook anything—not even the tiniest scrap of punctuation. To the best of your ability, try to consider the information presented to you in a vacuum. Assumptions and snap judgments are a riddle master’s worst enemy. Above all else, remind yourself that you can solve anything if you put your mind to it. Relax, take your time, and—of course—enjoy!

“Why is” Brain Teaser:

“Why”-type brain teasers are used to test your ability to analyze the world around you. They can be some of the most difficult teasers to approach since many people will often have trouble knowing where to even begin. They often take a widely accepted quirk of the world around you and challenge you to propose a reason for why that thing works the way it does. One example that will appear later in this book is the following: “Why is a tennis ball fuzzy?” This is a commonly used “why”-type teaser that highlights something which the majority of people have never questioned.

Working through this type of teaser is a great way to begin thinking more critically about our surroundings, especially those which have been created or engineered by other people. We accept most modern conveniences for what they are, never thinking to question what made them that way—but nothing ever works a certain way “just because.” Everything that we use that is menmade is crafted with intention, and the more that we can train ourselves to recognize that fact, the more effectively we’ll be able to solve problems of our own—even when we don’t have a clue, for instance, about the history of tennis.

Job Interview Questions That Are Not Brain Teasers

Some job interview questions may be difficult but may not be a brain teaser. Such questions often ask something about you vs. about some external problem you need to solve. Examples include:

“Are you more of a hunter or a gatherer?”

“If you were a box of chocolates, what kind of chocolates would you be and why?”

“How honest are you?”

“How would you explain the internet to a 3-year-old?”

These job interview questions can mostly be divided into two opposite realms: subjective and knowledge-based.

A subjective job interview question tends to have no correct answer, or at least an answer that depends on the person answering it. In a job interview, this might look like the typical prompt of “What is your greatest weakness?” or “Do you see yourself as more of a leader or a follower?” There are certainly right and wrong ways to go about responding to a question like this, but you can succeed for the most part simply by being honest about your experiences and abilities. In other words, a subjective question will never be trying to trick you in the same way that a brain teaser often will.

A knowledge-based job interview question measures your competence in a particular area; often a highly specialized one. When a job interviewer presents you with one of these, they’re trying to gauge your familiarity with a topic that will likely be central to the position for which you’re applying. You can think of these questions as the type that you might find on a high school history quiz. As long as you have your facts straight, you should be able to answer knowledge-based questions easily without taking too long to contemplate and problem-solve.

Compared to these other types of questions, brain teasers can be both easier and harder, depending on how you tend to problem-solve. You’ll never have to make an argument for yourself as a candidate when you’re dealing with a brain teaser, and you also won’t have to study a pile of facts beforehand. You can, however, increase your general aptitude to solve brain teasers via practice. Think of brain teasers like exercises for your mind. Your brain is a muscle like any other, and the more you use it, the stronger it will get. That’s why this post exists: to provide you with an additional opportunity to practice and get better at solving brain teasers. With that in mind, that’s another element of brain teasers that differentiates them from many other types of job interview questions: When you relax and take your time, they can be a whole lot of fun!

Practice brain teasers with other FC members

The good news is you can become better at solving brain teasers by practicing brain teasers on a daily basis. Below you will find some consulting brain teasers with answers. You can also join our Consulting Case Interviews facebook group where we post new brain teasers with answers on a daily basis and you can engage in conversation with other members of FC community about how to solve a particular brain teaser or about anything related to case interview prep. Everyone is welcome to join.

Consulting brain teasers with answers

Now, let’s look at some actual brain teasers. When you read each brain teaser try to calmly, confidently and with a sense of urgency solve it. Think through the problem and think through it as slow as your brain needs to get to the answer.

I remember when I was studying difficult subjects in university if I would try to go through my reading fast I would get lost. Instead, what I needed is to slow down and carefully think through all the connections the author was making to explain a particular point. Taking the time to think through a problem in steps often leads to much faster and better results versus rushing through it.

We see it all the time with members using The Consulting Offer training and even members using our advanced consulting skills training. Members who rush through the material, jump from episode to episode, from program to program, trying to find shortcuts and get through the material fast don’t do as well as members who are diligently working through the programs in the order in which we recommend it, carefully absorbing and mastering various concepts and approaches.

This same logic is applicable in solving brain teasers. If you rush you will probably get to the wrong answer.

For example, if we look again at a brain teaser we looked at above, the one about socks. Some candidates may immediately start panicking, “Oh, this is probably statistics. I need to understand probabilities. Oh my God, I don’t know how to solve it!”

Yet, all you need to do is to imagine you are in a dark room, there are white and black socks in the drawer. You need to get a matching pair. What are the possible scenarios? Well, you can get 2 socks but then there is no guarantee they will match.

Let’s say you get 3 socks, the next lowest number. What are the possible scenarios? Well, you could get 3 black socks, 3 white socks, 2 white socks, and 1 black sock or 2 black socks and 1 white sock. In each possible scenario, you end up with a matching pair. You see, when you calmly think through the problem, when you let your brain to process the information, the answer is easy and obvious. The key is to trust that you are smart and you will figure it out, and let your brain work through it at a speed it is comfortable at to figure it out.

And have fun with it. As you solve any cases during your case interview preparation or during an actual case interview have fun with it. Try to enjoy it. Having a solid problem-solving skill is powerful. You can do a lot of good in the world if you are good at problem-solving. So enjoy the process and trust in your ability to figure things out.

Practice consulting brain teasers

It’s important to note that difficulty is subjective, especially when it comes to problems that are structured with the goal of getting you to think outside of the box. If you find yourself stuck on a brain teaser, try working on some different ones before returning to it, and rest assured that you’ll get faster and faster as you familiarize yourself with reliable methods of problem solving.

If you want to check your solutions or if you just can’t seem to figure out a particular brain teaser no matter how much you scrutinize it, you can always flip to the bottom of the section, which contains solutions for every brain teaser. Each numbered solution will contain an “Answer” which is a straightforward statement providing the correct response to the teaser, and, where needed an “Explanation,” which goes into greater depth in examining the strategies or thinking pattern that one might employ in solving that particular teaser. You’re strongly advised to read the “Explanation” parts of the answer key, even if you were able to come to the correct conclusion by yourself. Oftentimes, these bits will highlight ways to optimize your thinking, making future brain teasers of a similar nature that much easier.

With that being said, get ready: It’s time to hit the mental gym.

Simple consulting brain teasers

The following 41 brain teasers are grouped under the “Easy” label, but that doesn’t mean that they won’t be challenging. In fact, some people find brain teasers like this to be the most difficult of them all because of their simplicity. If you’re used to relying on calculations and complex lines of logic, you’re best advised to set aside any preconceptions about how you should go about addressing these problems.

The most important tip to keep in mind for this section is to look very carefully at each question. If it seems too easy, it’s probably misleading you—and the same is true if it seems too hard. Keep an eye out for tricks of phrasing, double meanings, and convergence of the literal with the metaphorical. You’re looking for an “Aha!” moment that will frame the original teaser in an entirely new light.

Let’s start with a simple riddle. Ready? Set. Go!

(1) A farmer is trying to cross a river. He is taking with him a rabbit, carrots and a fox. He has a very small raft so he can only bring one item at a time across the river. How does he cross the river? Assume that the fox does not eat the rabbit if the farmer is there. Assume both rabbit and fox are not trying to run away.

This riddle can be solved easily if you put yourself in place of Jason.

(2) Jason’s father has 4 children; Suzan, Jeffrey, Jennifer. Who is the fourth?

The answer to this one will likely immediately be intuitive and then you can check the answer by thinking through the steps logically.

(3) The day before yesterday John was 17. Next year he will be 20. What day is his birthday?

(4) Two fathers and two sons sat down to eat eggs for breakfast. They ate exactly three eggs, each person had an egg. Can you explain how?

For this one, again, if you carefully think through connections the answer is obvious.

(5) Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

This was the most popular riddle we posted so far in our consulting case interviews facebook group . We broke down this question above.

(6) It’s dark in your room. You have a lot of white socks and black socks in your drawer. You want to get a matching pair, but socks are not organized. All socks are identical except for the color. What is the minimum number of socks you need to take to get a matching pair to wear?

Easy one if you carefully think through connections. Assume a speaker is not looking in the mirror.

(7) Brothers and sisters I have none but this man’s father is my father’s son. Who is the man?

(8) What has a head and a tail, but does not have a body?

(9) John’s father has three sons: Jeffrey, Jack and _____ ?

(10) 2 mothers and 2 daughters were fishing. They managed to catch one small fish, one big fish, one medium fish. Since only 3 fish were caught, how is it that they each took home a fish?

This one is a piece of cake, if you pay attention.

(11) How many times can you subtract the number 5 from 25?

Another fun, easy one.

(12) What has many keys but cannot open any doors?

This one is very intuitive.

(13) What is something you can keep after giving it to someone else?

(14) How many apples can you put into an empty containter?

Here is another easy one to help you warm up.

(15) When you add 2 letters, a 5 letter word becomes shorter. What is it?

Another simple one if you visualize what is happening.

(16) How far can a dog run into the woods?

And another fun one.

(17) A cowboy rides into town on Monday. He stays from 2 days and leaves on Monday. How is this possible?

(18) A man went for a walk and got caught in the rain. The man did not have an umbrella and he was not wearing a hat. His clothes got soaked but not a single hair on his head got wet. How is it possible?

And here is an obvious one.

(19) How many months have 28 days?

This one is intuitive.

(20) What is an odd number where if you take away one letter from it it becomes even?

And I love this one.

(21) What invention lets you look right through a wall?

(22) What never asks a single question but is often answered?

(23) The more you take the more you leave behind.

(24) What is full of holes but still holds water?

(25) It goes in dry and it comes out wet. The longer it is in the stronger it gets. What is it?

(26) A family lives in a large apartment building, on the 17th floor. They have a son. Every morning he takes the elevator from the 17th floor to the ground floor and goes to school. In the afternoon he uses the elevator to get to the 6th floor and then uses the stairs for the remaining floors. Why?

(27) You hold it without using your hands or arms. What is it?

(28) One brick is one kilogram and half a brick heavy. What is the weight of one brick?

(29) If Rebecca’s daughter is my daughter’s mother. What am I to Rebecca?

(30) Say speaker backward.

(31) When you have me you immediately feel like sharing me. But once you share me you no longer have me.

(32) If electric train is traveling south, which way is smoke going?

(33) How many times can you subtract 10 from 100?

(34) Amanda’s mother had 3 children. First one was named April, second child was named May. What is the name of the 3rd child?

(35) The more there is, the less you see. What is it?

(36) What always ends everything?

(37) I have seas without water, coasts without sand, towns without people, and mountains without land. What am I?

(38) You can find it in Mercury, Earth, Mars, Jupiter and Saturn, but not in Venus or Neptune. What is it?

(39) What coat is best put on wet?

(40) It’s at the center of gravity. You can also find it in Venus, but not in Mars. What is it?

(41) A clerk in a butcher shop stands six feet 5 inches tall and wears size 11 shoes. What does he weigh?

Answers to Simple consulting brain teasers

Medium difficulty consulting brain teasers

And here is a more difficult one for you.

(1) What do you notice about the following sequence of numbers? – 8, 11, 4, 9, 1, 6, 3, 0

And here is another somewhat difficult one.

(2) You have a 3-gallon jug and 5-gallon jug. You need to fill the 5-gallon jug with exactly 4 gallons of water. What would you do?

Another relatively easy one if you keep your mind open.

(3) How can you throw a ball, make it stop and travel in the opposite direction all while touching the ball only once.

(4) Imagine you had to put a coin into an empty bottle, then close the bottle with a cork. How could you take the coin out without removing the cork or breaking the bottle?

This one if one of my favorites.

(5) You have 3 boxes. One is with apples, one is with oranges and one has a combination of apples and oranges. All boxes are incorrectly labeled. In other words the label identifies incorrect content of the box. You can only open 1 box and without looking at the box you can take out 1 fruit and look at it. How can you label all the boxes correctly?

Here is another one of my favorites.

(6) You’re in a room with 3 light switches. Each light switch controls one of 3 light bulbs in the next room. How will you determine which switch controls which bulb if you can inspect the other room only once and cannot see into the other room from the other ?

Here is another fun one.

(7) How can a pant’s pocket be empty yet still have something in it?

(8) Which weights more, a pound of feathers or a pound of bricks?

An interesting one.

(9) A little girl fell off 29-meter ladder but did not get hurt. How is it possible?

And here you will need to do some math.

(10) Using only addition how can you get to number 1,000 by adding up eight 8’s?

(11) Heavy it is but reverse it’s not. What is it?

(12) What comes once in a minute, twice in a moment, but never in a thousand years?

(13) It’s as light as a feather. However, most people cannot hold it for longer than 2 minutes. What is it?

(14) What gets more wet while it dries?

(15) A man shaves several times a day but still has a beard. Who is he?

(16) You’re driving a city bus. At the first stop, 3 women get on. Then at the second stop, two children get on. At the 3rd stop, one man gets off and a man gets on. The bus is yellow and it’s snowing outside in December. What is the hair color of the bus driver?

(17) Two boxers are in a match scheduled for 12 rounds. One of the boxers gets knocked out after only 5 rounds, yet no man throws a punch. How is this possible?

(18) If a plane crashes directly on the border between the U.S. and Mexico, where will the survivors be buried.

Answers to Medium difficulty consulting brain teasers

Hard consulting brain teasers

Next, let’s take a look at this much more difficult riddle.

(1) Who makes it, has no need for it. Yet, who buys it, has no use for it. And who uses it can neither see nor feel it. What is it?

A sad and difficult one.

(2) A woman was born in 1996 and died in 1957. How is this possible?

This one is quite difficult.

(3) I have a dog that has 3 puppies: Barney, Cookie, and Sun. What is the mother’s name.

Here is a fun but slightly difficult one.

(4) What was the world’s tallest mountain before Mount Everest was discovered?

Here is a poetic but somewhat difficult brain teaser.

(5) What is at the beginning of eternity, the beginning of every end, the end of every place, and the end of time?

(6) What word looks the same backward and upside? Hint: There is more than 1 answer. One of the answers has something to do with water.

(7) Why tennis ball is fuzzy?

Answers to hard consulting brain teasers

It is difficult to predict which brain teaser questions you will likely to get during case interviews. But it certainly does not hurt to work out your problem-solving and critical thinking “muscles” with daily practice.

The “hardest logic puzzle ever” (originally published in 1996 by the Harvard Business Review)

If worked through those brain teasers and riddles, and if you’re still concerned about interviews, or if you just feel up for an even bigger challenge, try looking up other pre-written brain teasers in your spare time. Though this brain teasers article contained brain teasers with various levels of difficulty, there are far more advanced brain teasers, riddles and logic puzzles all over the internet. Just one example is the so-called “hardest logic puzzle ever,” originally published in 1996 by the Harvard Business Review.

Mathematician Richard Smullyan, with a nickname “the undisputed master of logical puzzles” developed a very challenging brainteaser. Smullyan’s colleague, an MIT logic professor named George Boolos, called it “the Hardest Logic Puzzle Ever” and it will become very clear why.

If you want to put your new skills to the test, go ahead and give it a shot:

You’re given the opportunity to communicate with three divine entities, which will be referred to in this brain teaser as A, B, and C. One of them always speaks the truth, one of them always lies, and one of them responds randomly with either the truth or a lie. They have a unique language that has never been translated by mortals, and though they can understand any language spoken to them, they will only respond with their own. Furthermore, the entities will only speak one of two words to you: “ja” and “da.” One of these words means yes and one of them means no, but you have no idea which is which.

You may ask these entities a total of three questions, which they will answer in their language. Only one entity can be addressed with each question. Using this, find a way to determine the identity of all three of them.

Before you start to brainstorm, take a moment to reflect on the different strategies that you’ve devised throughout your time spent working through previous brain teasers.

The “hardest logic puzzle ever”: Solution

If you find yourself scratching your head, know that you’re not alone; this brain teaser is cited as the world’s most difficult for a good reason! At the same time, though, it isn’t impossible. Everything that you need to know in order to find the correct solution is laid out in the riddle itself. There are no tricks or shortcuts this time; the steps that you need to take are purely logical. If you’re completely stumped, the internet can give you a hand—but try to avoid skipping to a solution right away. Instead, pull out a pen and paper and give it your best shot!

Here are the three questions you should ask, according to Nautilus :

1. To god A: “Does ‘da’ mean ‘yes’ if and only if you are True and if and only if B is Random?” (We supposed A said, “ja,” making B True or False).

2. To god B: “Does “da” mean ‘yes’ if and only if Pluto is a dwarf planet?” (We supposed B said, “da,” making B True.)

3. And to god B (True) again: “Does ‘da’ mean ‘yes’ if and only if A is Random?” Since B’s True, he must say “da,” which means A is Random, leaving C to be False.

Don’t worry if you’re still confused. You can start thinking through the solution with this 2008 paper , which states they came up with the easiest answer to the brain teaser. Or maybe you’d rather not dive right into the biggest challenge possible, which is completely understandable. In any case, whether or not you feel confident in your brain teaser solving abilities, don’t stop practicing. Bodybuilders don’t quit the gym just because they achieved their ideal weight, and the same principle applies here. Keep it up, and don’t let yourself get out of shape. There are numerous books, articles, and websites dedicated to the compilation of brain teasers, and now that you’ve familiarized yourself with some of the essential techniques, you’ll be amazed at how quickly and easily you can solve many of them.

Whether you’re an aspiring consultant, a seasoned professional, or just a curious person with a bit of spare time, you can always benefit from a good cerebral workout. At the end of the day, you’re going to be the one to set your own challenges—and remember that even the toughest problems have their solutions. As long as you believe in yourself, anything is possible.

Hope you enjoyed these consulting brain teasers with answers we selected for you to practice with. If you have good consulting brain teasers to add to this article please let us know in the comments below.

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241 Real-World Brain Teasers.: Guided problem-solving in Inventions, Nature, Uncommon Trivia, and Business Innovation. (Invent and Discover) Kindle Edition

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Enjoy figuring out creative solutions to real-world problems that have led to important inventions, discoveries, and innovations throughout history!

Do you love trivia quizzes... but wish these didn't rely so much on useless facts that you either know or you don't, leaving no room for actual thinking ?

Do you enjoy logic puzzles... but want to learn something more valuable than just getting correct answers to abstract, theoretical problems? Something more practical and fundamental ?

This book aims to change the game.

The problems in this book are related to erudition in fundamental areas - nature, technology, business, science, how things work, or why things are made in a certain way. But, unlike in trivia or jeopardy, you most probably do not know the answer. Instead, logic, out-of-the-box thinking, or intuition leap should be added to your general knowledge to puzzle out the correct solution.

Experience walking in the footsteps of discoverers, inventors, and innovators through taking on real-world problems that challenge you to tap into lateral thinking and creativity.

In this book, you will find:

Sharpen your logic, improve your analytical abilities, enhance your creativity, and develop your lateral thinking skills, all while having fun and learning more about the world around you.

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The problems are categorized into three difficulty levels: Easy, Intermediate, and Extra Challenging.

Each level is also organized by topic, giving you even more control of what you want to work on and how you want to play.

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In the ebook, the parts of each problem — question, hint, answer with explanation — are separated by page breaks.

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Questions are found mainly on the right-hand side of each spread, followed immediately by their respective hints at the bottom of the page.

Turning the page, you'll find the answers and additional information on the flip side, which would then be at the left-hand side of the spread.

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Unlock The Secrets To Solving Brain Teaser Puzzles – Tips And Tricks For Every Level

by Julie | Mar 7, 2023 | Puzzles

Brain teaser puzzles are a great way to exercise your mind and challenge your cognitive skills. From classic crossword puzzles to intricate Sudoku games, there is a brainteaser out there for everyone. But if you’re new to the world of brainteasers, it can be overwhelming. Fortunately, there are some simple tips and tricks you can use to help you complete these puzzles. With a bit of practice, you will soon be solving brainteaser puzzles with ease. So, if you’re curious to know more about how to complete brain teaser puzzles, keep reading to find out!

How Can 8 Plus 8 Be 4?

How can 8 and 8 = 4? What’s the formula? When you think about time. At 8 a.m., it equals 4 o’clock. At 11 a.m., it equals 4 o’clock.

Unlock Your Mind With Brain Teaser & Riddles!

To defeat Brain Teasers, you must outwit the game’s puzzles by finding the solution to each riddle. To create a successful game, you must first develop a solid understanding of the mechanics and a creative method of thinking. A three is the answer to “What comes before six?” because it is the third letter after “six” in the alphabet. Playing Brain Teasers is a great way to stimulate the mind and test your critical thinking ability . In addition to riddles and puzzles that appear frequently, the game will become increasingly difficult as you progress. To complete each challenge, you will need to think outside the box to solve the riddle and advance. You will be mentally stimulated and rewarded if you complete these puzzles.

Do Brain Teasers Help Your Brain?

Brain teasers are puzzles that challenge your brain to think and solve problems in unique ways. Research suggests that brain teasers can help to increase your critical thinking skills , improve your memory, and sharpen your problem-solving abilities. By engaging in brain teaser activities, you can also boost your creativity and become more flexible and adaptive in the way you approach tasks. Brain teasers can also help to reduce stress and improve your overall mental health. Overall, brain teasers are a great way to keep your brain active and healthy.

How Do Brain Teasers Help Mental Health?

You can increase your ability to concentrate and mull over problems by playing brain teasers and puzzles. You can restate and re-frame your assumptions. Combining the activity of the right and left hemispheres will enable you to change your perspective and integrate brain functions .

Why Are Brain Teasers Important For Students?

Brain teasers are intended to test your child’s ability to think outside of the box in order to develop problem-solving skills, improve critical thinking skills, and boost memory.

Can Riddles Increase Iq?

By playing riddles and puzzles, you not only improve your memory, problem-solving skills, visual and spatial reasoning , as well as your mood and stress levels, but you also improve your IQ.

How To Solve Brain Teasers Metal Puzzles

Solving brain teasers and metal puzzles can be an enjoyable and rewarding experience. To get started, it is important to identify any patterns or pieces that may stand out in the puzzle. Once these have been identified, it is important to think logically and systematically when attempting to solve the puzzle. If the puzzle is particularly difficult, it may be helpful to break the puzzle into smaller components and examine each part individually. Additionally, it may be beneficial to try a variety of approaches and think outside the box. Finally, it is important to keep an open mind and embrace mistakes as part of the learning process . With patience and perseverance, even the most challenging puzzles can be solved.

Brainteaser Interview Questions

Brainteaser interview questions are a type of question that are designed to get the interviewee thinking in a more creative and abstract way. These questions are often used to assess the problem-solving skills of the interviewee, as well as their ability to think on their feet. They can range from questions about mathematical equations to more abstract concepts such as how to explain a complex concept in a few words. Brainteaser questions can be used to see how well the interviewee is able to identify patterns and think outside the box. They can also help to reveal the individual’s thought process and how they approach unfamiliar problems.

Brain Teaser: Find The Next Term In The Sequence 0, 8, 24, 48, ..?

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Brain Teaser: Find The Next Term In The Sequence 0, 8, 24, 48, ..?

Brain teasers are puzzles designed to stimulate your brain by challenging your lateral thinking abilities to solve them. Unlike traditional puzzles, brain teasers require you to approach them from different angles and perspectives. Solving brain teasers can be a fun and enjoyable activity that helps improve your analytical thinking skills. However, distractions can hinder your ability to solve them effectively. In addition to being a great source of mental stimulation, brain teasers can also provide relaxation and help boost your memory when practiced regularly.

Are you ready to exercise your brain with a tricky math brain teaser? Solving logical brain teasers can be a fun and engaging way to challenge your thinking skills. In this brain teaser, your task is to find the next term in a sequence of numbers. The sequence starts with 0, then goes to 8, then 24, and then 48. Can you figure out what the next term is? This brain teaser will require some serious thinking, so get ready to activate those lazy brain cells and give it your best shot.

Find the next term 0, 8, 24, 48, ..?

While not all difficult questions can be classified as brain teasers, they are typically both enjoyable and thought-provoking. Mathematical puzzles, in particular, often involve addition, subtraction, multiplication, and division, as these basic operations form the foundation of math problems. The correct sequence of these operations leads to a precise solution for the given problem. To illustrate this concept, we have provided an example math puzzle in the image below.

This brain teaser requires analytical thinking and encourages you to explore all possible methods to reach a solution. Despite its initial complexity, it becomes easy once you identify the correct approach. The satisfaction and sense of accomplishment that comes from solving brain teasers are unparalleled.

To solve the given brain teaser, we need to identify the pattern in the sequence of numbers. Typically, mathematical expressions involve one or more of the four basic operations of addition, subtraction, multiplication, and division. However, in this case, simple calculations and the correct sequencing of numbers are all that is required to solve the expression.

Also read: Brain Teaser: Can You Spot 6 Words In Image Within 20 Secs Using Your Eagle Eyes

Solution Explained

Upon examining the given sequence, we can see that each term is the product of two consecutive even numbers, starting from 0 and multiplying each even number by its natural order. Therefore, the next number in the sequence would be 80, which is the product of 10 and 8 (i.e., 10 x 8 = 80).

Also read: Brain Teaser: Check How Sharp Your Eyes Are, Find Word Chocolate In 15 Secs

Hence, the answer is 80.

In conclusion, while mathematical puzzles may appear daunting initially, once you solve your first puzzle, you’ll likely find yourself eager to tackle more. It’s not necessary to be a mathematical expert to solve these kinds of puzzles. All you need is a high level of concentration, a creative approach, and some basic mathematical knowledge

Dinky, a Ramapo College of New Jersey alumnus, has worked as a journalist for over four years, covering a wide range of topics including current events, politics, fashion, celebrity news, and fitness. Oh and when Dinky is not writing about her favorite TV shows, she can be found binge watching them.

Brain Teaser IQ Test: You Have a Better Common Sense Than Others If You Can Spot What Is Wrong with This Jogging Image in 4 Seconds!

Brain Teaser IQ Test: IQ tests are often taken to determine whether someone has a high or low intelligence quotient (IQ). The test measures a person’s measure a person’s cognitive abilities, i.e., the capability to solve problems and reason logically.

There are several types of IQ tests, such as verbal, nonverbal, and full-scale. These tests are often exhaustive and tedious. Luckily, there is also an exciting and fun way to test your IQ- brain teasers.

Brain teasers are probably the most fun and exciting way to measure a person’s logical thinking and problem-solving abilities. And we have one ready for you.

Are you ready to challenge yourself and have some fun along the way?

Let’s get started.

Brain Teaser IQ Test- Spot the mistake in the jogging image in 4 seconds

Let’s take a good look at today’s brain teaser.

Source: Bright Side

In this brain teaser picture puzzle, you can see a woman jogging in the park. The image may look normal at first glance, but there is a mistake in it.

The mistake in the image can only be spotted by people with good common sense. Are you one of them? Let’s test you out!

Get ready, people. The challenge is going to begin.

Remember, time’s limited. You only have 4 seconds.

All the best!

Meanwhile, can you solve this?

High IQ Geniuses Have Failed to Spot the Odd Animal in the Image in 5 Seconds. Can YOU Pass This Test?

Have you found the mistake yet?

The clock’s ticking!

Were you able to spot the mistake in this brain teaser?

Some of you may have been able to solve this puzzle easily. Congratulations to them!

We sincerely hope that you were able to solve this brain teaser puzzle. This brain teaser’s solution is given below.

Brain Teaser Solution

In this brain teaser puzzle, you had to spot the mistake in this jogging picture in 4 seconds. In case, you were unable to solve this brain teaser picture puzzle, do not worry, scroll down to see the mistake in the image.

We hope you liked this brain teaser.

Science has shown that brain teasers enhance cognitive function and logical thinking abilities, making them effective mood enhancers. Simply put, brain teasers improve your cognitive abilities. Hence, be careful to address them every day.

We have quite a few of them here:

Can You Spot the Fake Princesses at the Castle in 5 Seconds?

Can You Help the Police Catch the Bacon Thief in 4 Seconds? Test Your Detective Skills!

How Smart are You? Prove Yourself by Catching the Pesky Moth in the Closet in 8 Seconds!

Only Bright-Eyed Individuals Can Find The Light Bulb Hidden In The Image In 4 Seconds. Can You?

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COMMENTS

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Riddles For Teachers Math Riddles For Kids Solved: 60% Show Answer A Goat, A Wolf, And A Head Of Cabbage A man has a goat, a wolf, and a head of cabbage. He comes to a river that has no bridge, but a small boat to cross the river. The boat can hold only one of the three things he has. If he takes over the wolf first, the goat will eat the cabbage.
Team Building Riddles: 17 Fun Examples
From simple wordplay to brain teasers, here is a list of team building riddles and answers. Q1. "A cowboy rides into town on Friday, stays for three days and leaves on Friday. How did he do it?" A1. The horse's name is Friday. Source: Riddles Brain Teasers Q2. "A man is going towards a field. He knows he will die when he gets there.
8 Terrific Brainteaser Interview Questions [Updated for 2023]
What are brainteasers? Brainteasers are puzzle-like questions that challenge a person's problem-solving skills. They often require lateral thinking or "thinking outside the box," because answers can't be calculated and solutions can't be reached via conventional methods.
Using brain teasers to build critical thinking skills
Using brain teasers to build critical thinking skills Here's a brain teaser: A rooster is on the roof of a barn facing east. The wind is blowing to the west at 10 miles per hour. The rooster lays an egg. Which direction does the egg roll? The answer appears below the image. Answer: There is no egg.
45 Fun and Clever Brain Teasers for Kids with Answers!
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Challenging Brain Teasers With Solutions: Long List
The brain teasers are hand-picked and solutions focus on systematic problem solving. Know how to solve difficult problems easily without wasting time on random attempts Our ebook on puzzle solutions by innovative methods will show you just that. Puzzles for Adults: 50 Brain Teasers with Step-by-Step Solutions: Boost Your Power of Problem Solving
Tricky brain teaser challenges you to find 'odd' letter within 13
The Mirror reports that JagranJosh has recently shared a tricky brain teaser that challenges you to try to identify a hidden letter among the Xs and Ks. (Image: Bright Side) If that doesn't sound ...
Brain Teasers, Puzzles and Games for Teens and Adults
Fun teasers on how our brains and minds work: 1. You think you know the colors? Try the Stroop Test 2. You say you can count? Check out this brief attention experiment 3. Test your stress level 4. Guess: Are there more connections in one human brain or leaves in the whole Amazon? Challenge your cognitive abilities with these brain teaser games:
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Circle the 100s (Hard) Find and circle the pairs of numbers that add up to 100. 1st through 3rd Grades. View PDF. How Old Am I? (Grade 5 and Up) Calculate how many weeks, months, and days old you are. Problem-solving worksheet requires higher-level multiplication skills. 3rd and 4th Grades.
67 consulting brain teasers with answers
Examples of mathematical brain teasers are probability questions. This barely qualifies as a brain teaser since it tests your math skills vs. your critical thinking and problem-solving ability. Mathematical brain teasers can be intimidating, but they're usually relatively straightforward in nature, even if they don't initially seem to be.
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Brain teasers in many categories for teachers, parents and students. Videos: Test Yourself: Teen Math: Math Facts: Math Diagnostics: Math Tricks ... Problem Solving Train Your Brain A Teaser A Day Keeps Dementia Away. Categories: Puzzles, Riddles, School Stuff, Friends, Lateral Thinking, Logic, Math, Nukkle Head: Friends: The club: Dating:
241 Real-World Brain Teasers.: Guided problem-solving in Inventions
241 Real-World Brain Teasers.: Guided problem-solving in Inventions, Nature, Uncommon Trivia, and Business Innovation. (Invent and Discover) - Kindle edition by Invent and Discover. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading 241 Real-World Brain Teasers.:
Unlock The Secrets To Solving Brain Teaser Puzzles
Brain teasers are puzzles that challenge your brain to think and solve problems in unique ways. Research suggests that brain teasers can help to increase your critical thinking skills, improve your memory, and sharpen your problem-solving abilities.By engaging in brain teaser activities, you can also boost your creativity and become more flexible and adaptive in the way you approach tasks.
Brain Teaser: Find The Next Term In The Sequence 0, 8, 24, 48
Brain teasers are puzzles designed to stimulate your brain by challenging your lateral thinking abilities to solve them. Unlike traditional puzzles, brain teasers require you to approach them from different angles and perspectives. Solving brain teasers can be a fun and enjoyable activity that helps improve your analytical thinking skills. However, distractions can hinder your […]
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