Ancient trick to calculate ANY square root
12:41
7 Puzzles With Surprising Solutions
18:25
The SAT Question Everyone Got Wrong
16:08
How to Play Chess: The ULTIMATE beginner guide
17:22
A Proof That The Square Root of Two Is Irrational
5:02
Square Root in 3 seconds - Crazy Math Trick
12:16
7 Outside The Box Puzzles
22:38
How To Catch A Cheater With Math
33:06