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How many number of weights do you need to weight 31 kg of Rice if you have one kg of weight stone ?
3
5
7
9
There are total 5 ways. we have only one kg of weight so, 2kg = 1kg + 1kg 4kg = 1 + 2 + 1 8kg = 1 + 2 + 4 + 1 16kg = 1 + 2 + 4 + 8 + 1 31kg = 1 + 2 + 4 + 8 + 16 So 5 weights are needed.
Hence, option 2 is the correct answer.
By: Amit Kumar ProfileResourcesReport error
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