KidzTube
Welcome
Login / Register

Brain Teasers


  • 05:14 New 10 Tricky Questions To Test Your Brain

    10 Tricky Questions To Test Your Brain

    by Admin Added 17 Views / 0 Likes

    10 tricky questions to test your brain and IQ level. Subscribe: https://goo.gl/Hnoaw3 ----------------------------------------------------------------------------------------- Other Videos you might like: 20 Things You Didn't Know About MONEY https://yout

  • 04:13 New 6 Riddles That Defy Logic

    6 Riddles That Defy Logic

    by Admin Added 11 Views / 0 Likes

    6 Riddles That Defy Logic Facebook: https://www.facebook.com/WOWQuiz Twitter: https://twitter.com/WOWQuizVideo Only Geniuses Can Find All The Differences https://www.youtube.com/watch?v=53II7KUz9ow Only a Genius Can Solve These 7 Brainteasers in 30 Second

  • 05:58 Can You Crack This Four Card Code?

    Can You Crack This Four Card Code?

    by Admin Added 21 Views / 0 Likes

    A surprisingly tricky card riddle. You'll need to put your thinking caps on for this one. Hi! I'm Jade. I'm an Aussie with a Bachelor's degree in Applied Physics. After three years and over 100 lab sessions, I realized I'm terrible at experiments. So now

  • 12:28 Can You Find the Odd Object Out in These Pictures?

    Can You Find the Odd Object Out in These Pictures?

    by Admin Added 18 Views / 0 Likes

    Can You Find the Odd Object Out in These Pictures? Facebook: https://www.facebook.com/WOWQuiz Twitter: https://twitter.com/WOWQuizVideo 10 Mind Bending Matchstick Puzzles https://www.youtube.com/watch?v=N1JsKW57sug How Good Are You At Spotting Details? ht

  • 04:48 10 Riddles That Will Trick Your Brain

    10 Riddles That Will Trick Your Brain

    by Admin Added 21 Views / 0 Likes

    Test your intelligence by answering correctly all these riddles. Subscribe: https://goo.gl/Hnoaw3 ----------------------------------------------------------------------------------------- Other Videos you might like: 10 CRAZY Mind Game Tricks To Fool Your

  • 05:27 9 Tricky Puzzles That Will Totally Blow Your Brain

    9 Tricky Puzzles That Will Totally Blow Your Brain

    by Admin Added 59 Views / 0 Likes

    Once you show children’s puzzles toadults, most ofthem immediately get abrain freeze. Try to stretch your brain alittle and check ifyou can cope with questions from children’s books! Subscribe to Bright Side : https://goo.gl/rQTJZz -----------

  • 04:47 Can you solve the egg drop riddle? - Yossi Elran

    Can you solve the egg drop riddle? - Yossi Elran

    by Admin Added 95 Views / 0 Likes

    Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/can-you-solve-the-egg-drop-riddle-yossi-elran The city has just opened its one-of-a-kind Faberge Egg Museum, with a single egg displayed on each floor o

    Featured
  • 06:34 10 IQ and Riddles For Kids With Tricky Answers

    10 IQ and Riddles For Kids With Tricky Answers

    by Admin Added 76 Views / 0 Likes

    10 IQ and Riddles For Kids With Tricky Answers. These are the best 10 IQ and Riddles For Kids With Tricky Answers. These are perfect for brain teasers for kids, teens and all. Please try this once and do not forget to like, share and comment.

  • 03:54 THESE POPULAR RIDDLES WILL BLOW YOUR MIND - Decipher Riddles & Brain Teasers

    THESE POPULAR RIDDLES WILL BLOW YOUR MIND - Decipher Riddles & Brain Teasers

    by Admin Added 31 Views / 0 Likes

    THESE POPULAR RIDDLES WILL BLOW YOUR MIND - Decipher Riddles & Brain Teasers These popular riddles on logic can be solved by any kid or adult who has high IQ. These riddles with answers will always test your brain and make your brain scratch. There are th

  • 08:11 7 Riddles That Will Test Your Brain Power

    7 Riddles That Will Test Your Brain Power

    by Admin Added 120 Views / 0 Likes

    These 7 Puzzles Will Trick Your Brain. Take this fun test tocheck the sharpness and productivity ofyour brain. Try toanswer these 7questions asquickly aspossible and see the results! --- Subscribe to our new channel 'SLICK SLIME SAM' - https://goo.gl/zarV

  • 07:19 11 Simple Riddles That Most People Can't Solve

    11 Simple Riddles That Most People Can't Solve

    by Admin Added 274 Views / 1 Likes

    12 tricky riddles you probably haven’t heard of. Try to find the right answers to check whether you’re a true genius! Subscribe to Bright Side : https://goo.gl/rQTJZz ----------------------------------------------------------------------------------------

    Featured
  • 05:51 Brain Games: Can you outsmart these puzzles?

    Brain Games: Can you outsmart these puzzles?

    by Admin Added 36 Views / 0 Likes

    Jason Silva, host of National Geographic's program "Brain Games," speaks to the "CBS This Morning" co-hosts about using experiments to challenge what we think we know about the brain.

  • 02:48 Brain Teasers | Brain Games

    Brain Teasers | Brain Games

    by Admin Added 33 Views / 0 Likes

    Comedian Ben Bailey is quizzing people's common sense with a few trick questions. Think you can't be fooled? Listen carefully and play along to find out how you fare. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About Brain Games: Using a series of experime

  • 02:42 Brain Games Challenge: YOU WILL FAIL!

    Brain Games Challenge: YOU WILL FAIL!

    by Admin Added 23 Views / 0 Likes

    Brain teaser having been featured on National Geographic. If you haven't seen it before this might just be impossible! Challenge your friends on Facebook. See the revised version here: https://www.youtube.com/watch?v=B-ZWSU-_uRo Like, Comment, and Subscri

  • 06:35 Only a Genius Can Solve These Riddles in 2 Minutes

    Only a Genius Can Solve These Riddles in 2 Minutes

    by Admin Added 111 Views / 1 Likes

    Logic puzzles are good for people of all ages because they give our minds a chance to limber up. Can you solve each of them in 15 seconds? If so, you can consider yourself a genius (we aren’t – we couldn’t get the last one). Subscribe to Bright Side : htt

  • 07:42 7 Visual Riddles to Test Your Brain Speed

    7 Visual Riddles to Test Your Brain Speed

    by Admin Added 73 Views / 0 Likes

    Only a true genius can solve these 7 visual riddles in less than a minute. Subscribe to Bright Side : https://goo.gl/rQTJZz ---------------------------------------------------------------------------------------- Our Social Media: Facebook: https://www.fa

  • 10:44 18 Tricky Riddles That'll Stretch Your Brain

    18 Tricky Riddles That'll Stretch Your Brain

    by Admin Added 165 Views / 1 Likes

    Subscribe to Bright Side : https://goo.gl/rQTJZz For copyright matters please contact us at: welcome@brightside.me ---------------------------------------------------------------------------------------- We've prepared some fun brain teasers that kids cra

    Featured
  • 04:01 Can you find the next number in this sequence? - Alex Gendler

    Can you find the next number in this sequence? - Alex Gendler

    by Admin Added 91 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-find-the-next-number-in-this-sequence-alex-gendler 1, 11, 21, 1211, 111221. These are the first five elements of a number sequence. Can you figure out what comes next? Alex Gendler reveals the answer and

  • 04:50 Can you solve the fish riddle? -  Steve Wyborney

    Can you solve the fish riddle? - Steve Wyborney

    by Admin Added 318 Views / 1 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-fish-riddle-steve-wyborney As the cargo director on the maiden voyage of the S.S. Buoyant, you’ve agreed to transport several tanks containing the last specimens of an endangered fish species t

    Featured
  • 03:44 The Train Bird Problem: What's Your Approach?

    The Train Bird Problem: What's Your Approach?

    by Admin Added 62 Views / 0 Likes

    The Rest Of Us on Patreon: https://www.patreon.com/TheRestOfUs The Rest Of Us on Twitter: http://twitter.com/TROUchannel The Rest Of Us T-Shirts and More: http://teespring.com/TheRestOfUsClothing

  • 00:36 How to create chocolate out of nothing

    How to create chocolate out of nothing

    by Admin Added 63 Views / 1 Likes

    Discover my other interactive magic here: http://www.marianotomatis.com Wanna solve world hunger with magic? This video will teach you how to create chocolate out of nothing. Here the cyclic GIF: http://www.marianotomatis.it/blog/images/20130409a.gif To u

  • 22:41 Calculating the optimal sphere packing density: with oranges

    Calculating the optimal sphere packing density: with oranges

    by Admin Added 50 Views / 0 Likes

    Check out the corresponding video I made with Steve Mould for his channel. https://youtu.be/O3RsDIWB7s0 Thomas Hales’s proof of the Kepler Conjecture. http://annals.math.princeton.edu/wp-content/uploads/annals-v162-n3-p01.pdf The Kepler Conjecture on wiki

  • 05:07 Check your intuition: The birthday problem - David Knuffke

    Check your intuition: The birthday problem - David Knuffke

    by Admin Added 157 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/check-your-intuition-the-birthday-problem-david-knuffke Imagine a group of people. How big do you think the group would have to be before there’s more than a 50% chance that two people in the group have the same

    Featured
  • 05:24 Can you solve the pirate riddle? - Alex Gendler

    Can you solve the pirate riddle? - Alex Gendler

    by Admin Added 462 Views / 3 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-pirate-riddle-alex-gendler It’s a good day to be a pirate. Amaro and his four mateys – Bart, Charlotte, Daniel, and Eliza have struck gold – a chest with 100 coins. But now, they must divvy up

    Featured
  • 05:13 Can you solve the virus riddle? - Lisa Winer

    Can you solve the virus riddle? - Lisa Winer

    by Admin Added 248 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-virus-riddle-lisa-winer Your research team has found a prehistoric virus preserved in the permafrost and isolated it for study. After a late night working, you’re just closing up the lab when a

  • 01:52 How to Solve a Rubik's Cube | Full-Time Kid | PBS Parents

    How to Solve a Rubik's Cube | Full-Time Kid | PBS Parents

    by Admin Added 112 Views / 0 Likes

    Watch Mya [unofficially] break the world record for solving a Rubik's cube, blind-folded! You won't REALLY learn how to solve the puzzle , but you'll learn a neat trick to show your friends and family. Executive Producer: Danielle Steinberg Meet Mya! She'

  • 01:51 Test your math IQ - Part 1

    Test your math IQ - Part 1

    by Admin Added 59 Views / 0 Likes

    Test your math IQ with this fun question. There are two 12 sided coins. Find the measure of the angle when the coins are side by side. Each side of the coin is equal length. My name is Chris and my passion is to teach math. Learning should never be a stru

  • 01:07 The Easiest Brain Teaser You Might Get Wrong

    The Easiest Brain Teaser You Might Get Wrong

    by Admin Added 89 Views / 2 Likes

    Try and solve the easiest brain teaser you might get wrong. The chicken costs $1.00 more than the egg, and together they cost a total of $1.06. How much does the egg cost? My name is Chris and my passion is to teach math. Learning should never be a strugg

  • 01:27 The Easiest Brain Teaser that will rack your brain

    The Easiest Brain Teaser that will rack your brain

    by Admin Added 125 Views / 0 Likes

    This is the easiest brain teaser that will rack your brain. 5 people can build 5 houses in 5 days. How long will it take 100 people to build 100 houses? My name is Chris and my passion is to teach math. Learning should never be a struggle which is why I m

  • 30:07 Mind Bending Math: Riddles and Paradoxes

    Mind Bending Math: Riddles and Paradoxes

    by Admin Added 59 Views / 1 Likes

    Learn that determining the will of the voters can require a mathematician. Delve into paradoxical outcomes of elections at national, state, and even club levels. Study Kenneth Arrow’s Nobel prize-winning impossibility theorem, and assess the U.S. Electora

  • 04:54 Can you solve the three gods riddle? - Alex Gendler

    Can you solve the three gods riddle? - Alex Gendler

    by Admin Added 190 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-three-gods-riddle-alex-gendler You and your team have crash-landed on an ancient planet. Can you appease the three alien overlords who rule it and get your team safely home? Created by logician

  • 03:29 Mind blowing brain teaser - Folding paper to the moon

    Mind blowing brain teaser - Folding paper to the moon

    by Admin Added 92 Views / 0 Likes

    Can you solve this mind blowing brain teaser? How many times can you fold a piece a paper before it reaches the moon? Find out the solution in this brain teaser in this video. My name is Chris and my passion is to teach math. Learning should never be a st

  • 04:33 Can you solve Zeno's paradox? - Brain Teaser

    Can you solve Zeno's paradox? - Brain Teaser

    by Admin Added 80 Views / 0 Likes

    Zeno's paradox is one of the most well know math puzzles in history. Is it possible to add an infinite amount of numbers and get an exact value? This is one example of Zeno's paradox. Try and solve this paradox and learn about the Greek philosopher Zeno i

  • 01:36 Are you smart enough to solve this simple brain teaser?

    Are you smart enough to solve this simple brain teaser?

    by Admin Added 88 Views / 0 Likes

    This simple brain teaser is not so easy. A virus is doubling every singe day. On the 67th day the virus has reached its max population. When will the virus reach half of its max population. My name is Chris and my passion is to teach math. Learning should

  • 03:51 Can You Solve This MIT Admissions Question? Geometry Problem, 1869

    Can You Solve This MIT Admissions Question? Geometry Problem, 1869

    by Admin Added 103 Views / 0 Likes

    The Massachusetts Institute of Technology (MIT) is one of the top ranked universities in the world. This question appeared on its admissions exam nearly 150 years ago. "The perpendicular dropped from the vertex of the right angle upon the hypotenuse divid

  • 08:04 Can you solve the burning stick riddle? ft Simone Giertz part 3/3

    Can you solve the burning stick riddle? ft Simone Giertz part 3/3

    by Admin Added 76 Views / 0 Likes

    How can you time 45 minutes with 2 sticks that each burn for one hour? Simone's channel: https://www.youtube.com/channel/UC3KEoMzNz8eYnwBC34RaKCQ First riddle video: https://www.youtube.com/watch?v=qplG78Guaa4 Second riddle video: https://youtu.be/ri49dTl

  • 06:31 The Boat/Rock Brainteaser ft Simone Giertz part 2/3

    The Boat/Rock Brainteaser ft Simone Giertz part 2/3

    by Admin Added 72 Views / 0 Likes

    Video on Simone's channel! https://www.youtube.com/watch?v=O3G9PuDZ_8c&t=40s Simone's channel: https://www.youtube.com/channel/UC3KEoMzNz8eYnwBC34RaKCQ First riddle video: https://www.youtube.com/watch?v=qplG78Guaa4 0:22 - riddle #1 - the falling wooden a

  • 04:09 Can you solve these physics riddles? ft Simone Giertz - Part 1/3

    Can you solve these physics riddles? ft Simone Giertz - Part 1/3

    by Admin Added 77 Views / 0 Likes

    Reading comments on Simone’s channel: https://www.youtube.com/watch?v=O3G9PuDZ_8c Check out Simone’s robots! https://www.youtube.com/simonegiertz Creator: Dianna Cowern Editor: Jabril Ashe Kyle Norby/ Dianna Cowern Thanks to Dan Walsh! Subscribe to Physic

  • 02:41 Trick Question - True or False

    Trick Question - True or False

    by Admin Added 164 Views / 0 Likes

    Think you can answer this simple trick question? Does .9 repeating equal 1? Find the solution in this video. My name is Chris and my passion is to teach math. Learning should never be a struggle which is why I make all my videos as simple and fun as possi

    Featured
  • 01:32 Easy Puzzle - But can you solve it?

    Easy Puzzle - But can you solve it?

    by Admin Added 79 Views / 0 Likes

    Solve this puzzle by cutting the piece of wood into two pieces. Both pieces must fit exactly into the hole. Can you solve this easy puzzle? Watch the video and find out. My name is Chris and my passion is to teach math. Learning should never be a struggle

  • 04:35 Can you solve the counterfeit coin riddle? - Jennifer Lu

    Can you solve the counterfeit coin riddle? - Jennifer Lu

    by Admin Added 163 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-counterfeit-coin-riddle-jennifer-lu You’re the realm’s greatest mathematician, but ever since you criticized the Emperor’s tax laws, you’ve been locked in the dungeon. Luckily for you, one of t

    Featured
  • 03:16 Can You Solve This 8th Grade Geometry Problem? 75% Got The Wrong Answer

    Can You Solve This 8th Grade Geometry Problem? 75% Got The Wrong Answer

    by Admin Added 98 Views / 0 Likes

    What is angle A in the star-shaped figure? This problem appeared on the 1999 AMC 8 test (intended for 8th grade students in the US). Approximately 75% of test-takers did not mark the correct response. Can you figure it out? Watch the video for a solution.

  • 06:24 Can You Solve The Missing Sock Puzzle?

    Can You Solve The Missing Sock Puzzle?

    by Admin Added 66 Views / 0 Likes

    A statistician keeps a simple wardrobe. He only purchases pairs of black socks and white socks, and he keeps all of the socks in a pile in the drawer. Recently one of the socks was lost in the laundry. The socks have a mathematical property. If you select

  • 06:18 Can You Solve The Diluted Wine Puzzle?

    Can You Solve The Diluted Wine Puzzle?

    by Admin Added 73 Views / 1 Likes

    A servant has a method to steal wine. He removes 3 cups from a barrel of wine and replaces it with 3 cups of water. The next day he wants more wine, so he does the same thing: he removes 3 cups from the same barrel (now with diluted wine) and replaces it

  • 04:38 Can you solve the airplane riddle? - Judd A. Schorr

    Can you solve the airplane riddle? - Judd A. Schorr

    by Admin Added 174 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-airplane-riddle-judd-a-schorr Professor Fukanō, the famous scientist, has embarked on a new challenge – piloting around the world in a plane of his own design. There’s just one problem: there's

  • 05:27 Can You Solve The Mind-Bending Self-Counting Sentence Riddle?

    Can You Solve The Mind-Bending Self-Counting Sentence Riddle?

    by Admin Added 151 Views / 0 Likes

    "In this sentence, the number of occurrences of the digit 0 is __, of the digit 1 is __, of the digit 2 is __, of the digit 3 is __, of the digit 4 is __, of the digit 5 is __, of the digit 6 is __, of the digit 7 is __, of the digit 8 is __, and of the d

  • 04:13 Can You Solve This Grade 12 Geometry Problem From Australia? The Marshmallow Chocolate Puzzle

    Can You Solve This Grade 12 Geometry Problem From Australia? The Marshmallow Chocolate Puzzle

    by Admin Added 89 Views / 0 Likes

    A marshmallow has the shape of a cylinder with diameter 5 and height 3. A dessert is made with 24 marshmallows: there are two stacked layers of marshmallows, and each layer has 3 rows of 4 marshmallows. The gaps between the marshmallows are filled with ch

  • 07:49 Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

    Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

    by Admin Added 107 Views / 0 Likes

    This problem has been shared millions of times on Twitter/Facebook with the claim "99% fail" to solve it and that only a genius could find the correct answer. If 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, then 3 = ? In this video I explain what many people b

  • 04:30 Adults Are Arguing About This 3rd Grade Math Problem

    Adults Are Arguing About This 3rd Grade Math Problem

    by Admin Added 91 Views / 0 Likes

    "If Sue runs around the track twice, and John runs around the track four times more than Sue, how many times does John run around the track?" This problem was given to 3rd graders. A parent disagreed with the answer the teacher was marking. After it was p

  • 09:11 Can You Solve The Rectangle Ratio Puzzle? The Surprising Answer

    Can You Solve The Rectangle Ratio Puzzle? The Surprising Answer

    by Admin Added 98 Views / 0 Likes

    Start with a unit square (a rectangle with both sides equal to 1, call it R1). Attach a rectangle of area 1 to its right side, then attach a rectangle of area 1 to its top. The border of this new shape is another rectangle, call it R2. We can repeat the p

  • 02:45 The Day After Tomorrow Is Yesterday Riddle. Can You Solve It?

    The Day After Tomorrow Is Yesterday Riddle. Can You Solve It?

    by Admin Added 105 Views / 0 Likes

    This puzzle is popular on Facebook and many other sites. "When the day after tomorrow is yesterday, then today will be as far from Wednesday as today was from Wednesday when the day before yesterday was tomorrow. What day is today?" Can you solve this tri

  • 07:47 Can You Solve The Probability The Newborn Is A Boy? Many Fail This Interview Question

    Can You Solve The Probability The Newborn Is A Boy? Many Fail This Interview Question

    by Admin Added 111 Views / 0 Likes

    This problem has been asked in job interviews. On the morning of January 1, a hospital nursery has 3 boys and some number of girls. That night, a woman gives birth to a child, and the child is placed in the nursery. On January 2, a statistician conducts a

  • 04:19 Can you solve the river crossing riddle? - Lisa Winer

    Can you solve the river crossing riddle? - Lisa Winer

    by Admin Added 415 Views / 1 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-river-crossing-riddle-lisa-winer As a wildfire rages through the grasslands, three lions and three wildebeest flee for their lives. To escape the inferno, they must cross over to the left bank

    Featured
  • 03:48 Can You Solve This Harvard Admissions Question? Algebra Problem, 1869

    Can You Solve This Harvard Admissions Question? Algebra Problem, 1869

    by Admin Added 138 Views / 0 Likes

    The Harvard admissions exam in 1869 included this algebra problem: "A man bought a watch, a chain, and a locket for $216. The watch and locket together cost three times as much as the chain, and the chain and locket together cost half as much as the watch

  • 05:57 Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"

    Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"

    by Admin Added 193 Views / 0 Likes

    This problem was given to Primary 6 (age 11-12) students in Singapore. What is the area of the shaded region in the video, which consists of the region bounded by 4 quarter circles in a 3x3 grid of squares, and each square has a side length of 4? The shad

  • 07:39 Can You Solve The Alien Extinction Riddle? Hard Job Interview Question

    Can You Solve The Alien Extinction Riddle? Hard Job Interview Question

    by Admin Added 136 Views / 0 Likes

    A single alien lands on Earth. Every day after that, each alien on Earth undergoes a transformation, which could be any of the four equally likely events: (a) the alien dies, (b) the alien does nothing, (c) the alien replicates itself (2 aliens total), (d

  • 11:27 Can You Solve The Viral 11x11 = 4 Puzzle? The Correct Answer Explained

    Can You Solve The Viral 11x11 = 4 Puzzle? The Correct Answer Explained

    by Admin Added 184 Views / 1 Likes

    If 11x11=4 and 22x22=16, what is 33x33=? This puzzle has been shared with the claim that only geniuses can solve it. It has gotten millions of views on the internet and Facebook as people have debated the correct answer. In this video I present what many

  • 04:53 Can you solve the prisoner boxes riddle? - Yossi Elran

    Can you solve the prisoner boxes riddle? - Yossi Elran

    by Admin Added 217 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-prisoner-boxes-riddle-yossi-elran Your favorite band is great at playing music...but not so great at being organized. They keep misplacing their instruments on tour, and it’s driving their mana

    Featured
  • 02:06 Can You Solve The Viral Matchstick Puzzle 6 + 4 = 4?

    Can You Solve The Viral Matchstick Puzzle 6 + 4 = 4?

    by Admin Added 194 Views / 0 Likes

    Can you fix 6 + 4 = 4 by moving 1 matchstick? This problem has gone viral on Facebook, with one post having over 400,000 shares. The ground rules are you cannot break a stick, it should be an equality (=), and you have to use 7-segment numbers (the block

  • 03:04 Trick Question - Find the missing dollar

    Trick Question - Find the missing dollar

    by Admin Added 105 Views / 1 Likes

    Trick question! Three friends are overcharged for their hotel room. The hotel decides to refund the difference. After the hotel issues the refund one dollar has mysteriously disappeared. Where is the missing dollar? Find the solution to this trick questio

  • 02:21 Trick Question - Test your math skills

    Trick Question - Test your math skills

    by Admin Added 84 Views / 0 Likes

    Find the maximum and minimum values of X in this trick question. Each value of X must satisfy the given inequality. Test your math skills and have fun with this trick question. My name is Chris and my passion is to teach math. Learning should never be a s

  • 02:51 The Horse Horseshoe Boots Viral Algebra Problem - The Correct Answer Explained

    The Horse Horseshoe Boots Viral Algebra Problem - The Correct Answer Explained

    by Admin Added 289 Views / 1 Likes

    A lot of people are arguing over the correct answer to this algebra problem involving horses, horseshoes, and boots. A Facebook post with this problem has over 500,000 comments. Can you figure it out? In this video I explain the correct answer. Blog post:

  • 05:33 What is 6÷2(1+2) = ? The Correct Answer Explained

    What is 6÷2(1+2) = ? The Correct Answer Explained

    by Admin Added 204 Views / 0 Likes

    What is 6÷2(1+2) = ? This problem went viral and generated millions of comments on Facebook, Twitter, YouTube and social media sites. I explain how to get the correct answer by using the modern interpretation of the order of operations. I also explain how

    Featured
  • 07:25 Can You Solve The Race To December 31 Riddle?

    Can You Solve The Race To December 31 Riddle?

    by Admin Added 87 Views / 0 Likes

    Here's a fun game you can play with another person. The game starts on January 1. Each of two players takes turns calling out another date. The new date has to be a later date in the year with either the same month OR the same day (from January 1, a playe

  • 08:05 Can You Solve The Hardest Easy Geometry Problem?

    Can You Solve The Hardest Easy Geometry Problem?

    by Admin Added 156 Views / 1 Likes

    In the figure, what is the value of angle x? This problem is known as Langley's Adventitious Angles. It is also known as the hardest easy geometry problem because it can be solved by elementary methods but it is notoriously difficult to work out. Can you

  • 05:55 "Impossible" Logic Puzzle - How Many Liars Are At The Party?

    "Impossible" Logic Puzzle - How Many Liars Are At The Party?

    by Admin Added 144 Views / 0 Likes

    A party has 100 people who are either liars are truth tellers. Liars always lie and truth tellers always say the truth. After the party you ask each person, "How many truth tellers did you shake hands with?" Each person gives a different answer from 0 to

  • 05:08 Can you solve this pier puzzle?

    Can you solve this pier puzzle?

    by Admin Added 71 Views / 0 Likes

    This math brainteaser challenges you to find a simple, elegant solution to a seemingly complex problem! Can you figure it out? There are two towns near a shore. They want to build a pier on the shoreline with a path connecting the pier to each town. They

  • 06:01 Popular Can You Solve The Viral 1 + 4 = 5 Puzzle? The Correct Answer Explained

    Can You Solve The Viral 1 + 4 = 5 Puzzle? The Correct Answer Explained

    by Admin Added 745 Views / 0 Likes

    This problem was shared on Facebook with the claim that only one in a thousand could figure it out. It went viral and generated over 3 million comments. Here is the problem. If 1 + 4 = 5, 2 + 5 = 12, 3 + 6 = 21, what is 8 + 11 = ? This video presents what

  • 06:24 Can You Solve The Chameleon Riddle?

    Can You Solve The Chameleon Riddle?

    by Admin Added 143 Views / 0 Likes

    A museum has 13 blue, 15 red, and 17 green chameleons. Whenever two chameleons of different colors meet, they both change into the color of the other chameleon (if blue and red met, for example, they would both turn green). As the chameleons mingle, is it

  • 07:21 Can You Solve The Magical Pond Puzzle?

    Can You Solve The Magical Pond Puzzle?

    by Admin Added 121 Views / 1 Likes

    (Same video with music: https://youtu.be/nF-Gpk0ZpRk) You visit a shrine that has 3 temples. Before each temple, you have to swim in a magical pond. Your path is pond-temple1-pond-temple2-pond-temple 3. Each time you swim, the pond magically triples the n

  • 05:26 Can You Solve The Red Ball Lottery Puzzle?

    Can You Solve The Red Ball Lottery Puzzle?

    by Admin Added 79 Views / 0 Likes

    (Same video without the music: https://youtu.be/sz5oLEpc8xE) This problem involves 100 red balls, 100 blue balls, and 2 urns. First you distribute all the balls between the 2 urns, placing at least 1 ball in each urn. Next, you select an urn at random, an

  • 04:08 Can You Solve The Passcode Riddle? - Ganesh Pai

    Can You Solve The Passcode Riddle? - Ganesh Pai

    by Admin Added 341 Views / 1 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-passcode-riddle-ganesh-pai In a dystopian world, your resistance group is humanity’s last hope. Unfortunately, you’ve all been captured by the tyrannical rulers and brought to the ancient colis

    Featured
  • 01:49 This Matchstick Puzzle Is

    This Matchstick Puzzle Is

    by Admin Added 121 Views / 1 Likes

    This classic matchstick/toothpick puzzle is making the rounds because it is supposedly "extremely hard" for adults. Can you make 3 squares by moving 3 matchsticks? You cannot break any of the sticks, the resulting squares must be of equal size, and each t

    Featured
  • 07:10 TOUGH Interview Question - Ways To Give 11 Coins To 3 People

    TOUGH Interview Question - Ways To Give 11 Coins To 3 People

    by Admin Added 81 Views / 0 Likes

    How many ways can you divide 11 coins to 3 people? How many ways are there if each person has to get at least 1 coin? This puzzle is an example of a technical interview question. The video demonstrates the solution, which indicates the number of non-negat

  • 06:57 When Is Christmas? Mentally Convert Date To Day Of The Week

    When Is Christmas? Mentally Convert Date To Day Of The Week

    by Admin Added 71 Views / 0 Likes

    January 1, 2016 is a Friday. When will Christmas be in 2016? What about Christmas in 2055? You can do this in your head! Blog post (text explanation): http://wp.me/p6aMk-4qQ Doomsday Rule (previous video): https://www.youtube.com/watch?v=UsStBxY9STw Calcu

  • 04:22 Impossible Algebra Problem

    Impossible Algebra Problem

    by Admin Added 317 Views / 0 Likes

    This problem is making the rounds. Can you place numbers in the four boxes so all the equations are true? Blog post (text/image explanation): http://wp.me/p6aMk-4up If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecis

  • 03:25 Can You Solve This? AA + BB + CC = ABC

    Can You Solve This? AA + BB + CC = ABC

    by Admin Added 157 Views / 0 Likes

    If AA + BB + CC = ABC, what are the values of A, B, and C? All the digits are distinct and positive. Watch the video for a solution. Blog (text explanation): http://wp.me/p6aMk-4Cm If you like my videos, you can support me at Patreon: http://www.patreon.c

  • 02:57 Viral Facebook Math Problem

    Viral Facebook Math Problem

    by Admin Added 195 Views / 0 Likes

    This problem has over 2 million comments on Facebook and is getting coverage in mainstream media and blogs. Can you figure out this Facebook fruit algebra puzzle involving apples, bananas, and coconuts? The video presents what many people consider to be t

  • 06:24 The Seemingly Impossible Escape Logic Puzzle

    The Seemingly Impossible Escape Logic Puzzle

    by Admin Added 186 Views / 0 Likes

    An evil logician takes Alice and Bob captive. They have a chance to escape if they can deduce the total number of trees in the prison. Can they figure it out? Source of puzzle wu: riddles forum https://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board

  • 01:18 Can You Make 4 Triangles From 6 Matches?

    Can You Make 4 Triangles From 6 Matches?

    by Admin Added 127 Views / 0 Likes

    Can you use 6 matches to make 4 triangles of equal size and equal shape? This is harder than it sounds! Give it a try before watching the video for a solution. If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions

  • 07:52 Find The 10 Digit Number Classic Puzzle And Solution

    Find The 10 Digit Number Classic Puzzle And Solution

    by Admin Added 80 Views / 0 Likes

    I'm thinking of a 10 digit number that uses the each digit 0 to 9 exactly once and where the number formed by the first n digits is divisible by n. What could my number be? The video explains how to find the answer using tests for divisibility. Blog post:

  • 01:57 I Will Read Your Mind - Math Magic Trick

    I Will Read Your Mind - Math Magic Trick

    by Admin Added 238 Views / 0 Likes

    Pick a 2 digit number. Got it? Now and add up the digits. Subtract that from your original number. Look up the resulting number in the table. Can I figure out the symbol you are looking at? This video predicts your symbol and explains why this math trick

    Featured
  • 03:33 Can You Solve This Intelligence Test? Viral Facebook Puzzle

    Can You Solve This Intelligence Test? Viral Facebook Puzzle

    by Admin Added 97 Views / 0 Likes

    If 6 + 4 = 210, and 9 + 2 = 711, what is the rule to combine numbers? This "intelligence test" has been shared more than 3 million times on Facebook. On Twitter people claim solving it means you have an IQ of more than 150 (genius level). In this video I

  • 04:52 Can You Solve The Two Rope Puzzle?

    Can You Solve The Two Rope Puzzle?

    by Admin Added 90 Views / 0 Likes

    You have two ropes and a lighter. Each rope burns in 60 minutes, but the ropes do not burn at a constant rate. How can you measure 45 minutes by burning the ropes? Some of you might have heard this problem before. If so, try this variation: how can you me

  • 08:27 Can You Solve The 3 Cards Riddle?

    Can You Solve The 3 Cards Riddle?

    by Admin Added 110 Views / 0 Likes

    There are 3 cards in this problem. One card is blue on both sides, another is red on both sides, and the last is red on one side and blue on the other. The cards are put in a bag and I pick one at random. Without looking at the colors on the card, I place

  • 02:57 Can You Solve This Crazy Equation? Ramanujan's Radical Brain Teaser

    Can You Solve This Crazy Equation? Ramanujan's Radical Brain Teaser

    by Admin Added 91 Views / 0 Likes

    In 1911, Srinivasa Ramanujan posed this problem involving an infinite nested radical (a never-ending expression that has square roots inside of square roots). Can you figure out how to simplify the equation? The video presents an intuitive solution. Techn

  • 03:09 Can You Solve The Marriage Logic Problem? 80% Fail

    Can You Solve The Marriage Logic Problem? 80% Fail

    by Admin Added 87 Views / 0 Likes

    Surveys have found 80 percent get this logic problem wrong. Alice is looking at Bob, and Bob is looking at Charlie. Alice is married; Charlie is not. Is a married person looking at an unmarried person? Answer choices are A) Yes, B) No, and C) Cannot be de

  • 05:09 Can You Solve The Snake Eyes Probability Riddle?

    Can You Solve The Snake Eyes Probability Riddle?

    by Admin Added 102 Views / 0 Likes

    You close your eyes and roll a pair of dice. The casino dealer announces that at least one of the rolls is showing a 1.What is the probability that both dice are showing a 1? Watch the video for the solution. (Snake eyes is a term for rolling a pair of 1s

  • 02:37 Adults Stumped By Maths Questions For 15 Year Olds. Can You Solve Them?

    Adults Stumped By Maths Questions For 15 Year Olds. Can You Solve Them?

    by Admin Added 122 Views / 0 Likes

    How hard are math tests? A survey asked 2,000 UK adults to answer sample GCSE test questions intended for 15 year old students. On average, the survey questions were missed by about 40% of adults. Can you solve them? The video presents 2 questions that ma

  • 04:13 Adults Stumped By Geometry Problems For 10 Year Olds. Can You Solve Them?

    Adults Stumped By Geometry Problems For 10 Year Olds. Can You Solve Them?

    by Admin Added 112 Views / 0 Likes

    These homework problems were given to 10 year old children (Year 5) in England (Glossop, Derbyshire) and they were posted to Facebook when some adults found them to be difficult. One person claimed the problems were impossible to solve. Can you figure the

  • 03:28 Flower Math Problem - Adults Stumped By Question For Kids In China

    Flower Math Problem - Adults Stumped By Question For Kids In China

    by Admin Added 149 Views / 0 Likes

    This problem is said to come from a test given to a Chinese kindergarten class (5 year olds). It was posted online and caused a lot of debate as adults were stumped about the correct answer, some saying it is impossible. Can you figure it out? This video

  • 04:01 Can You Solve The Control Room Riddle? - Dennis Shasha

    Can You Solve The Control Room Riddle? - Dennis Shasha

    by Admin Added 281 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-control-room-riddle-dennis-shasha As your country's top spy, you must infiltrate the headquarters of the evil syndicate, find the secret control panel, and deactivate their death ray. But your

    Featured
  • 05:05 Try This April Fools' Trick! (Mystery Math)

    Try This April Fools' Trick! (Mystery Math)

    by Admin Added 200 Views / 0 Likes

    Here's a simple trick you can play on your friends!

    Featured
  • 03:50 Can You Solve The Locker Riddle? - Lisa Winer

    Can You Solve The Locker Riddle? - Lisa Winer

    by Admin Added 410 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-locker-riddle-lisa-winer Your rich, eccentric uncle just passed away, and you and your 99 nasty relatives have been invited to the reading of his will. He wanted to leave all of his money to yo

    Featured
  • 02:24 Will A Cat Win A Race Against A Dog?

    Will A Cat Win A Race Against A Dog?

    by Admin Added 185 Views / 1 Likes

    You may have heard about the race between the tortoise and the hare, but have you heard about the race between the cat and the dog? SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow CONNECT WITH CURIOSITY Facebook ➤ http://ww

  • 03:56 Mind Reading With Numbers

    Mind Reading With Numbers

    by Admin Added 184 Views / 0 Likes

    When someone is thinking of any number between 1 and 1000, Deane shows how to find that number with just 10 questions. It may seem like mind reading, but it is really logic. SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow C

    Featured
  • 01:32 Restaurant Puzzle   Strange Code

    Restaurant Puzzle Strange Code

    by Admin Added 70 Views / 0 Likes

    Deane and Rob decipher a coded message left in a restaurant. SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow CONNECT WITH CURIOSITY Facebook ➤ http://www.facebook.com/CuriosityShow Twitter ➤ https://twitter.com/CuriositySho

  • 04:31 Can You Solve The Frog Riddle? - Derek Abbott

    Can You Solve The Frog Riddle? - Derek Abbott

    by Admin Added 346 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-frog-riddle-derek-abbott You’re stranded in a rainforest, and you’ve eaten a poisonous mushroom. To save your life, you need an antidote excreted by a certain species of frog. Unfortunately, on

    Featured
  • 04:13 Can You Solve The Temple Riddle? - Dennis E. Shasha

    Can You Solve The Temple Riddle? - Dennis E. Shasha

    by Admin Added 275 Views / 1 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-temple-riddle-dennis-e-shasha Your expedition finally stands at the heart of the ancient temple. But as you study the inscriptions in the darkness, two wisps of green smoke burst forth. The wal

  • 03:10 Don't Checkmate - Brain Teaser

    Don't Checkmate - Brain Teaser

    by Admin Added 106 Views / 0 Likes

    Don't checkmate the black king. In this brain teaser you must find one move for white which will not result in immediate checkmate for the black king. I also have a bunch of other fun brain teasers as well. My name is Chris and my passion is to teach math

  • 02:04 Guess The Diagonal - Brain Teaser

    Guess The Diagonal - Brain Teaser

    by Admin Added 121 Views / 0 Likes

    Try to solve this brain teaser in less than a minute. You must guess the diagonal inside of the circle. There is enough information given which allows you to find the length of the diagonal in less than a minute. My name is Chris and my passion is to teac

  • 04:09 Counterfeit Coins - Brain Teaser

    Counterfeit Coins - Brain Teaser

    by Admin Added 90 Views / 1 Likes

    Find the counterfeit coins in one of the eight bags! You may only use the weight scale once in this brain teaser. How do you know which bag has the counterfeit coins? I also have a bunch of other fun brain teasers as well. Heaven and hell - Brain Teaser h

  • 01:51 Crossing The River - Brain Teaser

    Crossing The River - Brain Teaser

    by Admin Added 171 Views / 0 Likes

    Try to solve this fun brain teaser. Cross the river with all of the zombies and humans. The boat can only fit two at a time. Also there can never be more zombies than humans. My name is Chris and my passion is to teach math. Learning should never be a str

  • 06:35 Bisecting Yin And Yang  - Brain Teaser

    Bisecting Yin And Yang - Brain Teaser

    by Admin Added 114 Views / 0 Likes

    Can you bisect yin and yang using a straight line? Find the solution to this brain teaser in this video. I also have a bunch of other fun brain teasers as well. Heaven and hell - Brain Teaser https://www.youtube.com/watch?v=YOgKI0HWCnA Two burning ropes -

  • 03:40 Two Burning Ropes - Brain Teaser

    Two Burning Ropes - Brain Teaser

    by Admin Added 115 Views / 0 Likes

    Two burning ropes are needed to measure 45 minutes exactly. Each rope takes exactly one hour to burn, but they don't burn at a constant rate. Each rope is made of a different material and burns differently from the other. How do we measure 45 minutes exac

  • 05:13 Can You Solve

    Can You Solve

    by Admin Added 199 Views / 0 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-einstein-s-riddle-dan-van-der-vieren View all the clues here: http://ed.ted.com/lessons/can-you-solve-einstein-s-riddle-dan-van-der-vieren#digdeeper Before he turned physics upside down, a young Al

  • 03:19 Heaven And Hell - Brain Teaser

    Heaven And Hell - Brain Teaser

    by Admin Added 202 Views / 0 Likes

    Fun brain teaser in which you have to choose between two doors. One of the doors leads to heaven and the other door leads to hell. You are allowed to ask the guards one question. What is one question that would guarantee certainty of choosing the door to

  • 08:29 The Uncracked Problem With 33 - Numberphile

    The Uncracked Problem With 33 - Numberphile

    by Admin Added 121 Views / 0 Likes

    33 is the lowest unsolved problem in the world of "summing three cubes". But 30 was also a tough nut to crack! Featuring Tim Browning from the University of Bristol. Taxi Cab Numbers: https://youtu.be/LzjaDKVC4iY Fermat's Last Theorem: https://youtu.be/qi

  • 04:52 Can You Solve The Boat Puzzle?

    Can You Solve The Boat Puzzle?

    by Admin Added 224 Views / 0 Likes

    You throw a rock in water from your boat. Can you figure out what happens to the water level? physicsgirl.org instagram.com/thephysicsgirl facebook.com/thephysicsgirl twitter.com/thephysicsgirl Host/Writer/Editor: Dianna Cowern With help from: Jimmy Wong

    Featured
  • 04:35 Can You Solve The Prisoner Hat Riddle? - Alex Gendler

    Can You Solve The Prisoner Hat Riddle? - Alex Gendler

    by Admin Added 329 Views / 2 Likes

    View full lesson: http://ed.ted.com/lessons/can-you-solve-the-prisoner-hat-riddle-alex-gendler You and nine other individuals have been captured by super-intelligent alien overlords. The aliens think humans look quite tasty, but their civilization forbids

  • 03:35 Answering Question From Visual Inequality System

    Answering Question From Visual Inequality System

    by Admin Added 81 Views / 0 Likes

    Answering question from visual inequality system

  • 03:50 Can You Solve The Bridge Riddle? - Alex Gendler

    Can You Solve The Bridge Riddle? - Alex Gendler

    by Admin Added 428 Views / 1 Likes

    View full lesson: https://ed.ted.com/lessons/can-you-solve-the-bridge-riddle-alex-gendler Taking that internship in a remote mountain lab might not have been the best idea. Pulling that lever with the skull symbol just to see what it did probably wasn’t s

    Featured
  • 02:07 What Colour Is This Dress? (SOLVED With SCIENCE)

    What Colour Is This Dress? (SOLVED With SCIENCE)

    by Admin Added 127 Views / 0 Likes

    Share this video for the sake of the human race!! Get the AsapSCIENCE Book: http://asapscience.com/book Subscribe! bit.ly/asapsci Written by Mitchell Moffit and Greg Brown Instagram and Twitter: @whalewatchmeplz and @mitchellmoffit Clickable: http://bit.l

  • 07:14 How To Win A Guessing Game - Numberphile

    How To Win A Guessing Game - Numberphile

    by Admin Added 265 Views / 0 Likes

    A clever use of random numbers to improve your odds in a number guessing game. Alex Bellos Books: http://bit.ly/BellosBooks Monty Hall problem: http://bit.ly/MontyHallProb NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://ww

    Featured
  • 04:42 The Famously Difficult Green-eyed Logic Puzzle - Alex Gendler

    The Famously Difficult Green-eyed Logic Puzzle - Alex Gendler

    by Admin Added 337 Views / 2 Likes

    View full lesson: http://ed.ted.com/lessons/the-famously-difficult-green-eyed-logic-puzzle-alex-gendler One hundred green-eyed logicians have been imprisoned on an island by a mad dictator. Their only hope for freedom lies in the answer to one famously di

  • 05:48 Winning At Rock Paper Scissors - Numberphile

    Winning At Rock Paper Scissors - Numberphile

    by Admin Added 237 Views / 0 Likes

    Squarespace: http://www.squarespace.com/numberphile This video features Hannah Fry - https://twitter.com/fryrsquared More on this topic (and lizards): http://youtu.be/Z8lv2vy5vco And even more on this topic: http://youtu.be/ygHwBxWyI6E The paper: http://b

    Featured
  • 03:15 Should You Catch A Tossed Coin? - Numberphile

    Should You Catch A Tossed Coin? - Numberphile

    by Admin Added 194 Views / 0 Likes

    Randomness expert (and former magician) Persi Diaconis on whether it is best to catch a coin or let it fall to the ground. Main video: http://youtu.be/AYnJv68T3MM Extra footage: http://youtu.be/9RKKoXw7wJw Superbowl coin tosses: http://youtu.be/bFfSfzjhfC

    Featured
  • 11:34 That Viral Math Problem (Cheryl's Birthday) - Numberphile

    That Viral Math Problem (Cheryl's Birthday) - Numberphile

    by Admin Added 179 Views / 0 Likes

    Simon Pampena gives his take on THAT viral math problem from Singapore. EXTRA FOOTAGE for this video: http://youtu.be/Mj-YngjjpJg Simon on Twitter: https://twitter.com/mathemaniac NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: h

  • 12:56 Monkeys And Coconuts - Numberphile

    Monkeys And Coconuts - Numberphile

    by Admin Added 179 Views / 0 Likes

    An old problem which baffled many people. Featuring Dr Tony Padilla. Editing and animation in this film by Pete McPartlan - https://twitter.com/petemcpartlan NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com

  • 01:38 An Impossible Bet

    An Impossible Bet

    by Admin Added 233 Views / 0 Likes

    Should you take the bet? Click here to find out: http://youtu.be/C5-I0bAuEUE Thanks to my friend Dan Hoff for introducing me to this problem! MinutePhysics is on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics And twitter -

    Featured
  • 03:59 Solution To The Impossible Bet

    Solution To The Impossible Bet

    by Admin Added 234 Views / 1 Likes

    This problem is called the "100 Prisoners Problem", more info on the math here: http://en.m.wikipedia.org/wiki/100_prisoners_problem Thanks to http://www.ifixit.com for supporting us on Subbable! and to Subbable supporter @vicnice137 And thanks to my frie

  • 09:29 Cheryl's Birthday

    Cheryl's Birthday

    by Admin Added 171 Views / 0 Likes

    Deductive reasoning problem from Singapore.

  • 12:16 3-D Path Counting Brain Teaser

    3-D Path Counting Brain Teaser

    by Admin Added 145 Views / 0 Likes

    Extending the path counting to three dimensions More free lessons at: http://www.khanacademy.org/video?v=wRxzDOloS3o

  • 10:42 Path Counting Brain Teaser

    Path Counting Brain Teaser

    by Admin Added 150 Views / 0 Likes

    Counting paths in a square More free lessons at: http://www.khanacademy.org/video?v=9QduzzW10uA

  • 11:19 Light Bulb Switching Brain Teaser

    Light Bulb Switching Brain Teaser

    by Admin Added 165 Views / 0 Likes

    Turning light bulbs on and off. More free lessons at: http://www.khanacademy.org/video?v=WNhxkpmVQYw

  • 12:09 Forehead Numbers Brain Teaser

    Forehead Numbers Brain Teaser

    by Admin Added 176 Views / 0 Likes

    The perfect logicians are at it again. More free lessons at: http://www.khanacademy.org/video?v=jqpQPxWj8gE

  • 11:01 Blue Forehead Room Solution

    Blue Forehead Room Solution

    by Admin Added 189 Views / 0 Likes

    Do not watch before Blue Forehead Room. THIS IS THE SOLUTION! More free lessons at: http://www.khanacademy.org/video?v=-xYkTJFbuM0

  • 07:25 Brain Teaser: Blue Forehead Room

    Brain Teaser: Blue Forehead Room

    by Admin Added 183 Views / 0 Likes

    What happens when 100 perfect logicians have to figure out if they each have a blue forehead? More free lessons at: http://www.khanacademy.org/video?v=rBaCDC52NOY

  • 16:59 Alien Abduction Brain Teaser

    Alien Abduction Brain Teaser

    by Admin Added 185 Views / 0 Likes

    Saving Earth from becoming a mushroom farm. More free lessons at: http://www.khanacademy.org/video?v=K4pocYXOmTQ

  • 11:13 Toggler Brain Teaser

    Toggler Brain Teaser

    by Admin Added 178 Views / 0 Likes

    Separating the truthteller from the togglers! More free lessons at: http://www.khanacademy.org/video?v=l3OkPYhDi9w

  • 06:50 Liar Truthteller Brain Teaser

    Liar Truthteller Brain Teaser

    by Admin Added 139 Views / 0 Likes

    How to get correct advice when you can only ask one question from either a liar or a truthteller (when you don't know who is what) More free lessons at: http://www.khanacademy.org/video?v=69rDtSpshAw

Categories





















RSS