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#1 chessmaster2011

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Posted 29 December 2011 - 03:32 PM

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A ball bearing factory has 10 machines (machine no.1 to machine no.10),producing steel balls of exactly the same size. To ensure that the machines are producing the right size, a quality inspector routinely weighs the balls with a sensitive weighing machine. A new opening has arisen in the factory for this job. The production manager explains the weighing procedure to all the applicants and poses this problem:
One of the machines has been producing balls that are 1milligram over or under the specified weight . You get to weigh only once. Use as many balls from any/all machines as you wish. After single weighing you should point out which machine is producing the defective balls and report whether the defective balls are 1mg over or under the specified weight.

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#2 chessmaster2011

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Posted 29 December 2011 - 03:57 PM

Sorry, I searched ball bearings and could not find the problem on the site. But a similar problem exists in weighing problems section.
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#3 dheeraj54

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Posted 29 December 2011 - 05:26 PM

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