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, July 30, 2012
Zero, Zilch, Nothing
There are two letters of the alphabet that mean zilch, zero, nothing. Which two are they?