nordlead on 17 September 2008
the last one only took me like 2 minutes to solve, but probability is one of my favorite subjects! Granted, the VGC problem is actually very very tough, but it is more than just a puzzle, it is really a small example of the difference between humans and machines, theroms, axims and all sorts of wonderful math topics.
I'd post easier ones, but they seem so obvious to me that I don't feel like it would be a challenge to anyone.
