Another good thing about Project Euler is that the problem is usually presented in a simple form, which you first try to reproduce, and then it scales up in a w

Another good thing about Project Euler is that the problem is usually presented in a simple form, which you first try to reproduce, and then it scales up in a way that you have to optimize in order to achieve success in under 1min of cpu processing time. The result is that you learn a lot about how to make more elegant solutions.