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!
Monday, January 30, 2006
Riddle me this?
What object has keys that open no locks, space but no room, and you can enter but not go in?