Can you solve the water glass and wine bottle riddles?
22:40
Solving a legendary puzzle
20:08
The unsolved math problem inspired by a children's game
10:45
Very few people can solve. Which martini glass is closest to 1/2 full?
13:33
How To Calculate Any Square Root
18:14
Could you pass this interview? The famous batteries and flashlight logic puzzle
29:42
Why 4d geometry makes me sad
16:52
Rotation without rotating.
18:49