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Sign up for our newsletter and never miss an animation: http://bit.ly/TEDEdNewsletter One hundred green-eyed logicians have ...

You're a bank robber trying to escape from jail. Can you solve the riddle to get past the fence to freedom? -- Your timing made you ...

Can you use some logic to figure out what color your hat is in this quick puzzle? Difficulty: 3/10 Chapters: 0:00 Intro 1:56 Pause ...

Grow your brain! Read informative Ebooks on current affairs, logical tests, vocabulary boosters and more to learn everyday.

Four friends claim they have been wrongly imprisoned. They are not criminals but mere harmless logicians! The warden says, "If ...

A classic logic puzzle / riddle. Are you up to the challenge? (With support and, finally, the solution.)

An evil warden holds you prisoner, but offers you a chance to escape. There are 3 doors A, B, and C. Two of the doors lead to ...

... Raymond Smullyan, and popularized by his colleague George Boolos, this riddle has been called the hardest logic puzzle ever.

View full lesson: http://ed.ted.com/lessons/can-you-solve-the-passcode-riddle-ganesh-pai In a dystopian world, your resistance ...

How smart are you? These puzzles are simple enough to be solved over your coffee break. And tricky enough to stump you for ...

TED-Ed has launched its first ever physical game: Pandora's Legacy! Learn more and get your copy here: ...

View full lesson: https://ed.ted.com/lessons/can-you-solve-the-bridge-riddle-alex-gendler Want more? Try the buried treasure ...

Get ready for a new portion of mind-blowing riddles! This marathon full of tricky riddles will get your brain working really fast.

Practice more problem-solving at https://brilliant.org/TedEd -- Your agent has infiltrated a life or death poker game in a hidden ...

Can you solve this? Special thanks this month to: Lee Redden, Kyle, Daniel Lewis. Thanks to all supporters on Patreon and ...

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 ...

Alice and Bob are secretly told consecutive numbers, but neither knows the other person's number. They cannot communicate or ...