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, December 01, 2009
Easier Than Yesterday
There are 8 balls.
7 balls are the same, the 8th is slightly heavier than the rest.
You also have a balance-scale (the one with a platform on either side) but it has no markings on it.
Using the scale twice, locate the ball that is heavier.