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!
Wednesday, August 05, 2009
It Took Me Months to Solve This One
The following sets of letters are related in a way known to most people. Can you find the missing letters?