Could you pass the very first SAT exam?
13:33
Ancient trick to calculate ANY square root
18:25
The SAT Question Everyone Got Wrong
22:38
Cómo atrapar a un tramposo con matemáticas
24:43
The Lever Paradox
21:08
19 Types of Students in an Exam
13:30
The Raven Paradox - A Hiccup in the Scientific Method
12:40
3 outside the box problems from China
11:51