My answers to projectEuler problems - you can see the projectEuler site here
##Edit:
After submitting my first answer I saw the message about not posting answers outside of Project Euler. Having followed Project Euler for a while I feel the competitive end of the user spectrum are the guys trying to solve the latest problem (512 at the time of writing).
With that in mind I have decided to continue to version control my answers and will stop if I ever get halfway to the latest problem. (Likely never to happen...)
If Project Euler get in touch and ask me to stop I will of course respect their wishes as a fan of the site.