These are my solutions (or just attempts) to some of the problems. Seriously, don't look any further, unless you are 100% percent sure you know what you do. Spoilers are baaaad. You've been warned.
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.
For more info click me. It's really awesome way of learning your language!