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 13, 2005
You have nine tennis balls and four shopping bags. Your job is to put all the balls in the bags such that there is an odd number of balls in each bag. That is, each bag must contain 1, 3, 5, 7, or 9 balls.