Saturday, June 6, 2009

Brain Teaser Question: 9 Tennis B

Nine ping pong balls and a traditional balance are lying in front of you. All balls have the same weight except for one, which is slightly heavier than the others. What is the minimum number of times you will need to use the balance to be sure you found the heavy tennis ball?

Answer to the coin flipping question: 2 (Hint:Gropu them by 3)