Google Answers: Answer this riddle for two dollars
2004-5-9 · A ping pong ball is dropped down the pipe. There is about a quarter of a centimeter clearance around the ping-pong ball and the pipe. Your task is to get the ping pong ball out of the steel pipe undamaged. The only items that are available are a wooden ruler, a ball of string, a pocket mirror, a paper clip, and a small magnet.
