Popular Science's "Unsolved" Car Puzzle
12:11
When a genius misses an easy question
14:02
Is 1/4 of the circle shaded? Most students get this wrong
19:14
The strange cousin of the complex numbers -- the dual numbers.
23:51
Why is this number everywhere?
22:59
The Dome Paradox: A Loophole in Newton's Laws
10:45
Very few people can solve. Which martini glass is closest to 1/2 full?
15:42
A Fascinating Frog Problem - Numberphile
22:40