Eight weights!

Logic Level 2

Suppose you are given 8 identical 1 kg weights. But one of them is slightly(~50g) less than its real weight. You also have a balance. So, Can you guess minimum number of times balance is used in order to find the defected weight?.


The answer is 2.

Sachin Vishwakarma by Sachin Vishwakarma , 22, India

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1 solution

Simply, put 3-3 on balance and two in side. If balance is balanced then weight the two which are on side. If the balance is not balanced then take the 3 from the less weighted side. Now from 3 put 2 on balance and one in side. Now you can easily predict in minimum of 2 times using the balance.

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Hey I think your question would have been more trickier if you have asked for 9 similar balls instead of 8,now it's my question can you find minimum no. Of times balance used with 9 similar balls

Just have a try : ) :)

Atul Shivam - 5 years, 7 months ago

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That will also require 2 times.

Sachin Vishwakarma - 5 years, 7 months ago

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Correct : ) :)

Atul Shivam - 5 years, 7 months ago

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