Aggvent Calendar Day 15
3:19
Aggvent Calendar Day 16
4:58
4 Squares 1 Circle
15:51
Find the area of the circle | Sweden Math Olympiad Geometry Problem
8:22
Aggvent Calendar Day 17
4:54
Aggvent Calendar Day 30
7:06
The Simple Question that Stumped Everyone Except Marilyn vos Savant
8:04
Viral question from China
6:22