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, June 17, 2009
Do You Know Your Presidents?
The 22nd and 24th presidents of the United States had the same mother and the same father, but were not brothers. How can this be possible?