The hardest problem on the hardest test
16:03
The unexpectedly hard windmill question (2011 IMO, Q2)
22:21
Why do prime numbers make these spirals? | Dirichlet’s theorem and pi approximations
23:07
This mechanism shrinks when pulled
18:49
How to lie using visual proofs
17:14
the 5 hardest exams in the world
18:40
Mais, c'est quoi un réseau de neurones ? | Chapitre 1, Apprentissage profond
15:08
What does it feel like to invent math?
21:22