This Month's Contest:THE PRISON BREAK There are two cellmates locked in a prison cell. The guard will come in five hours to execute them. There is a window that is high up on the wall through which they could escape if they could reach it. The...
This Month's Contest: WEIGHING THE COINS. You have seven stacks of coins, each with 100 coins. Each stack contains either only real coins or only phony coins. The goal is to figure out how many stacks of coins are authentic and how many are...