Question 983906: You are given eight golf balls. seven of the golf balls have the exact same weight but one ball is slightly lighter, you cannot feel the difference. you have a balance scale but can only make two weighings. how can you find the lighter ball in only two weighings? explain.
Answer by macston(5194)   (Show Source):
You can put this solution on YOUR website! .
Weigh 3 balls on each side. If they don't balance, take the three from the heavier side. Put one on each side of the balance. If they balance, the third ball is the heavy one. If they don't balance, the heavier side is the heavy ball.
If the scale balances during the first weighing with 3 on each side, the heavy ball is one of the other two, use the second weighing to determine which.
|
|
|
