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!
Tuesday, February 22, 2011
Does Anyone Buy Analog Clocks Anymore?
If we follow the hour and minute hands of a clock for 24 hours how many times will they form a right angle?