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

• Placement Papers
• /
• TCS
• /
• HR Interview
• /
• Interview

TCS Question Papers: TCS Interview Experience(90) TCS Company Profile

(#M40002745) TCS HR Interview question maths Keep an EYE

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

Like manish sir answer on facebook.

Asked In TCS Anand (12 years ago)

Solved Read Solution (2)

Is this Puzzle helpful?   (12)   (11) Submit Your Solution Interview

Read Solution (2) :

anurag  (12 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.

Is this solution Helpfull? Yes (6) | No   

soujanya  (12 years ago)

answer pleaseeeeeeeeee

Is this solution Helpfull? Yes | No (1)  

Please Login to Read Solution.