Project Euler: Mathematical Challenges

[KenR]

For those not having enough to do, here are some mental challenges for you to work at.

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.

http://projecteuler.net/index.php?section=about

from http://blog.sc.tri-bit.com/

[Ruffnekk]

I've been a member there a long time (username Ruffnekk) and I managed to solve many already. If you want to learn how to achieve some stuff on your own this site is fantastic! Some seriously difficult problems here!