a twist on a classic circle problem
18:04
the most creative digit sum problem I have seen!!
17:26
Researchers thought this was a bug (Borwein integrals)
6:19
A continuous function equation.
11:26
is this triangle even possible??
11:12
What the Submarine Puzzle Teaches Us About Infinity
19:27
How Paul Erdős Cracked This Geometry Problem | The Anning-Erdős Theorem
12:52
Why slicing a cone gives an ellipse (beautiful proof)
20:11