10 machines are producing bulbs. weight of each bulb from each machine is 10gms say. But due to some manufacturing fault, 1 machine out of 10 machines is producing 11gm bulb. You don't have physical balance to measure. How can you will find it out, which machine is producing 11gm bulb.If you are saying 5th machine - then prove itIf you are saying 6th machine - prove it.

Pranay

• Aug 2nd, 2017

As per the question, we dont have physical reason to measure, so we will have to test each bulb of each machine of first production. Whichever will not work that does mean the bulb is of that machine.

p.anand.3190

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• Nov 12th, 2010

1 bulb from machine 1+ 2 bulbs from machine 2 + 3 from machine 3 +......+ 10 bulbs from machine 10. if all the bulbs weigh 10gms then the total would be 550gms. but the bulbs produced by one mach...

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