| 1. |
How many number of weights do you need to weight 31 kg of Rice if you have one kg of weight stone ? |
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Answer: Option B Explanation: 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. |
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