Latest TCS Aptitude Question SOLUTION: in 27 coins one coin is counterfeit what is minimum number of waitings to find out counterfeit coin???

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in 27 coins one coin is counterfeit what is minimum number of waitings to find out counterfeit coin???

Solution

1st step: weight 13-13 if equal then 27th is counterfeit coin, otherwise
2nd step: weight 6-6 if equal then 13th is counterfeit coin, otherwise
3rd step: weight 3-3, and take one whose weight is less
4th step: weight 1-1, if equal then 3rd is counterfeit coin othen that one for which weight is less
so answer is 1 or 2 or 4

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Asked In TCS Anand (13 years ago)

Solved Read Solution (2)

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Read Solution (2) :

anurag  (13 years ago)

Ans is 3.
We make group of 9-9-9 coins.
By 1st weighting we get 1 set of 9 coins having counterfiet coin.
Then similarly divide that group in 3-3-3.
And then in 1-1-1.

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soujanya  (13 years ago)

answer pleaseeeeeeeeee

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