Anyone knows about Project Euler?
Its a website that gives you logical and math challenges to solve using any programming language you want. There's a score ladder, and can view scores by language and country, along with other stuff.
I managed to solve 48 problems, all using Delphi, and I'm ranked 2¬? in my country, and 17¬? in Delphi users
If you are smart and have nothing better to do, try this
http://projecteuler.net