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 23, 2008
Vacation From School
In how many ways can you arrange 100 identical stones into 3 piles so that each pile has at least 1 stone in it.