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!
Friday, May 18, 2007
They grow up so fast!
In 1990, a person is 15 years old. In 1995 that same person is 10 years old. How is this possible?