There are [[Triangle Numbers]]. There are [[Square Numbers]]. There are actually pentagon numbers and hexagon numbers, too. You can go on forever. And it turns out that the pattern of: - You can make any number by summing up no more than 3 triangle numbers - You can make any number by summing up no more than 4 square numbers …extends _forever_. For any N-sides polygon, you only need `N` of them to sum up to _any_ number. **** # More ## Source - [Numberphile](https://youtu.be/CK3_zarXkw0?si=Y1QzU5IDa-XTeXJI) ## Related