Friday, August 3, 2007
Puzzle 5
There are ten bags containing marbles. Each bag has at least 10 marbles in it. Nine of the bags contains only marbles weighting 10 grams each. One of the bags contains only marbles weighing nine grams each. Each bag has a different number of marbles in it. All of the marbles look exactly the same. The riddle is how can you know which bag has the nine gram marbles if the only device allowed to be used is a weighing scales which you can use only once?
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1 comment:
number bags from 1 to 10
remove 1 marble frm bag 1
2 frm bag 2
so on....
weigh them.....if we assume all marbles of 10g then total shold be 550....since one bag is of 9g weight will be less...let us assume it as x
difference 550-x will give the bag number which has 9g marbles
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