could you get in to this Japanese university?
12:33
what a nice Diophantine equation.
15:41
probably a Putnam probability problem
13:03
a complex approach to a classic sum
6:46
You probably haven't solved a square root equation like this before
27:37
Math Teachers Don't want you to Find This out
20:39
a surprising exponential closure
14:15
Functional Equation
11:56