I'm posting one puzzle, riddle, math, or statistical problem a day. Try to answer each one and post your answers in the comments section. I'll post the answer the next day. Even if you have the same answer as someone else, feel free to put up your answer, too!
Tuesday, December 06, 2005
Cut a hole in the center of an index card just large enough for a small coin to pass through. How can you push a large coin through the hole without tearing the index card?