Question 14
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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 ?
- A 3
- B 5 Correct
- C 7
- D 9
Correct Answer: Option B
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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