You have 4 weights weighing 2,3,5 and 7 pounds. The problem is none of them are marked. What is the fewest number of weighings you need using a balance scale figure out which weights are which?
(In reply to
re: done in 3 weighings.... I think =P by Brian Smith)
you just have to get a balanced scale in the beginning... and the only way to achieve a balanced scale would be 2+3 v 5 or 2+5 v 7... you can't be sure what is what until the final weighing... so it takes a little chance... but it IS done in 3! =D
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Posted by Vina
on 2004-07-26 14:06:20 |
re(2): done in 3 weighings.... I think =P
