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Farm Fair Contest

 

What is the minimum number of weighing operations required to measure 63 kg of wheat, if only one weight of 1 kg is available?

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Anonymous from Somewhere
School: Some School
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Your answer: 7
Explanation: First, measure 1 kg of wheat. Then transfer the 1 kg to the other side with the weight. Doing this lets u weigh 2 kg of wheat. Then transfer and repeat so you can measure 4 kg. Then 8kg the 16 kg then 32kg and lastly 64kg. That gets 6 operations. But you have to find 63 so measure 1 kg and take that off. That makes 7 operations.

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