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 08, 2009
Fridays Are Supposed to be Easy
What number should logically replace the question mark?
26, -39, 58 ½, -87 ¾, ?
Update: Thanks for pointing out the missing question mark! I added it in.