I Challenge You To Simplify This! |9th #maths
11:31
Solving a 'Harvard' University entrance exam
18:39
Can you crack this beautiful equation? – University exam question
20:01
Factoring Quadratics WITHOUT Guessing Product & Sum
14:44
Can you crack this TOUGH math problem? - 2015 German Math Olympiad.
9:10
A simple question most people get wrong
12:34
You Probably Know A Narcissist (here’s how to spot them)
14:47
The way math should be taught
10:55