How will you find out the heavier coin in minimum number of weighing?

billa's picture
Submitted by billa on Thu, 07/30/2009 - 17:11.

Consider there are 9 coins.and 8 are of 1 gm and 1 is 2 grams then How will you find out the heavier coin in minimum number of weighing and how many weighing is need?

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