how to find the ball that over weighs from the group of 7 ball which look identical. You have only 2 chances to weigh

swapna222 · 13-11-07, 12:34 AM

if there are 7 balls which are identical to see and one ball of these 7 balls
is heaviest and u have to find that heaviest ball.You are given a weighing
machine and You can weigh them only 2 times.
plzz give the answer and thanks in advance.

**sk_kireeti** · 13-11-07, 12:22 PM

in first attempt put 3 balls in one side and 3 ball in another side. If they are equal, the remaining ball is over weighted. Otherwise, we will know which side the heaviest ball sits.

In second attempt, take ball from heavier side and put 1 ball on each side of the weight balance. If they are same, the remaining ball is over weighed or, the balance will show the ball which has more weight.

Thanks,
Krishna

13-11-07, 12:34 AM	#1 (permalink)
swapna222 Junior Member Join Date: Oct 2006 Age: 21 Posts: 23 Thanks: 0 Thanked 0 Times in 0 Posts Rep Power: 4	how to find the ball that over weighs from the group of 7 ball which look identical. You have only 2 chances to weigh if there are 7 balls which are identical to see and one ball of these 7 balls is heaviest and u have to find that heaviest ball.You are given a weighing machine and You can weigh them only 2 times. plzz give the answer and thanks in advance.
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13-11-07, 12:22 PM	#2 (permalink)
sk_kireeti Super Moderator Join Date: Feb 2006 Posts: 2,379 Blog Entries: 4 Thanks: 118 Thanked 319 Times in 238 Posts Rep Power: 60	Re: answer this in first attempt put 3 balls in one side and 3 ball in another side. If they are equal, the remaining ball is over weighted. Otherwise, we will know which side the heaviest ball sits. In second attempt, take ball from heavier side and put 1 ball on each side of the weight balance. If they are same, the remaining ball is over weighed or, the balance will show the ball which has more weight. Thanks, Krishna __________________ Looking for trainees for a start up company
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