Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems.
The motivation for starting Project Euler, and its continuation, is to provide a platform for the inquiring mind to delve into unfamiliar areas and learn new concepts in a fun and recreational context.
-- Project Euler .net
Sound like fun!
I wish I someone introduce me to these problem when I was 10
-- Me
I swear if I have kids, I will ask them to solve them for whatever toys they want LOL! seriously I mean it!