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, January 31, 2011
It takes one day for ten workers to dig ten holes.
It takes two days for five workers to dig ten holes.
How much does it take for one man to dig HALF a hole?