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Old 08-01-2007   #1
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Default a maths question?

Got 10 Coin Machines,each Machine Produces Coins Which Is 10 Grams In Weight The Situation Is One Of The Machine Got Fault N Produce Less Coins Than The Other Nine Machines Now,we Got A Weighting Scale And We Only Can Weight The Coins One Time.how Can We Know Which Machine Got Fault?
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