13:24

An interesting infinite sum

26:43

can you do the hardest problem from the European Mathematical Cup??

11:25

A nice number puzzle from the 2001 Bangladesh math olympiad

17:26

Researchers thought this was a bug (Borwein integrals)

15:31

The Reciprocals of Primes - Numberphile

9:20

a fun functional equation

23:06

Math News: The Fish Bone Conjecture has been deboned!!

17:47

Let's talk about Heron's formula (example and proof)