Latest Google Aptitude Question SOLUTION: how many number of weight do you need to weight 31 kg of Rice if you have one kg of weight stone?

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how many number of weight do you need to weight 31 kg of Rice if you have one kg of weight stone?

Asked In Google MANDAR PARGAONKAR (7 years ago)

Unsolved Read Solution (9)

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Sukalyan Sen  (7 years ago)

5 weighings required.
1 kg= 1kg stone
2 kg=(1+1)
4kg=1+2+1
8kg=1+2+4+1
16kg=1+2+4+8+1
31kg=1+2+4+8+16
Total 5 operations

Is this solution Helpfull? Yes (3) | No   

suraj kumar  (7 years ago)

Zero, bcz if you know it is 31 kg then what is the need of weighing it?

Is this solution Helpfull? Yes (2) | No   

Mohammad Shadab  (7 years ago)

One because we can weigh it by 1kg at a time.

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sarbasis das  (7 years ago)

5 times,
first 1kg weight=1kg rice
then put the 1kg rice with the weight,and that makes a 2 kg weight. measure the next 2kg of rice using this weight and put the measured 2 kg of rice with the weight, that makes a 4 kg weight.repeat this process until the weight is 16 kg. measure another 16 kg of rice that means a total of 32 kg. out of which 1 kg is the weight stone. so you will end up with 32-1=31 kg of rice.

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GAGANDEEP KUMAR  (7 years ago)

there are total 5 ways.
we have only one kg of weight so,
2kg=1kg+1kg
4=1+2+1
8=1+2+4+1
16=1+2+4+8+1
31=1+2+4+8+16

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Shubhangi Patil  (7 years ago)

If you weight the 1kg rice one by one then we used this one kg of weight stone.
And if you weight 31kg rice at a time then we required 30 kg of weight stone and (one kg of weight stone this is given to the questions).

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piyush  (7 years ago)

5
1+2+4+8+16

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avesh kumar agrawal  (6 years ago)

1
with one stone kg rice will be weighted after using one kg rice and one kg stone two kg rice can be weighted so on......

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avesh kumar agrawal  (6 years ago)

5
by repetition

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