Sunday, September 22, 2013

Puzzle 1

Puzzle 1
There are 20 boxes, each box containing anywhere from 1 to 10 balls. No more than two boxes contain same no of balls. Each ball weighs 100gm. One of the boxes contains all defective ball/balls(each defective ball weigh 99 gm) You are given an electronic weighing machine. In how many minimum weighs can you determine which box has defective balls? 

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