There are 8 balls . 7 of them weigh the same . 1 of them has a different weight , -LRB- you do n't know if it 's heavier or lighter -RRB- . How do you find the odd ball with 2 weighs ?
You have eight balls all of the same size . 7 of them weigh the same , and one of them weighs slightly more . How can you find the ball that is heavier by using a balance and only two weighings ?