That Viral Math Problem - Numberphile

That Viral Math Problem (Cheryl's Birthday) - Numberphile

Viral Math Problem (additional discussion) - Numberphile

The Goat Problem - Numberphile

Monty Hall Problem - Numberphile

The Josephus Problem - Numberphile

The Moving Sofa Problem - Numberphile

The Legend of Question Six - Numberphile

The 10,958 Problem - Numberphile

Olympiad problems on polynomials

HUB OF MATHEMATICS

The problem in Good Will Hunting - Numberphile

Ham Sandwich Problem - Numberphile

The Centrifuge Problem - Numberphile

The Light Switch Problem - Numberphile

That Viral Math Problem (Cheryl's Birthday) - Numberphile

Tree Gaps and Orchard Problems - Numberphile

Get Off The Earth (a famous & bamboozling problem) - Numberphile