Grocer Ganapathi
Grocer Ganapathi have a beam balance, which he can use to weigh upto 40 pounds.
What is the minimum number of weights, he will need and what are the weights ?
What is the minimum number of weights, he will need and what are the weights ?
Labels: logic, mathemagic
posted by Rajesh Lal at
8:05 AM
9 Comments:
He needs 8 weights:
5 1-pounders
1 5-pounder
1 10-pounder
1 20-pounder
He could get away with 7 weights if he didn't have to weigh anything that was exactly 40 pounds. In that case he could get rid of one of the 1 pounders.
1, 3, 9, 27 are all he needs
example, to get weigh a 22lb object,
27lb, 3lb and 1lb on one side,
9 on the other along with the 22lb object
31lb vs 31lb, balances out. You can do this for any number up until 40
how much wood could a chuck norris chuck if a chuck norris could chuck wood? yea you guys should figure this one out
anonymous 2 = douchebag... =\
I think the answer is 6.
1 lb.
2 lb.
4 lb.
8 lb.
+16 lb.
--------
31 lbs.
+9 lb
--------
40 lbs.
i have seen this puzzle before. The only weights he needs is 1, 3, 9 and 27.
e.g. 21: 27___________9
5: 9___________3,1
Leslie, that's ingenious!
But it would be a pretty unpractical weighing scales, you would have to do a lot of trying around before you know what something weighs.
2 at 20 poundes each.
Haha. Fools.
1 at 40lbs.
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