Re: weighting problems...
[COLOR="Purple"]Correct me if iam wrong...
1.Divide the pile to 2(12 each)....Weigh ...Take the pile that weigh heavier
2.Divide that pile to two(6 each) ...and weigh again...Take the pile that weighs more
3.Divide that pile to two(3 each) ...and weigh again...Take the pile that weighs more
4.Compare the weight of 2 coins of the remaining three,,
If they r equal,the third one weighs more
If not ,the one that weighs more...Weighs more!!
So..i think we need 4 weighs...????[COLOR="Purple"][/COLOR][/COLOR]
Re: weighting problems...
Good Try Rose...Four attempts not a correct answer...
Try Again...I think u found easily....
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suresh
Re: weighting problems...
Divide the pile into 3. 8 coins each. weigh two sets of coin.
Take the one which weighs heavier. If both are of equal weight, then take the one that is not yet weighed.
Again divide that 8 coins into 3 sets. one having 2 coins and other having 3 coins.
weigh the 3 coin sets. Take the set that is heavier. If both are equal, take the 2 coin set.
Do the same again.
Thus [B]can be done in 3 weighings[/B].
Re: weighting problems...
Yes Barbie...Your answer is correct...
Good work and thanks for contributing...
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suresh