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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 United States
School: NATIONAL.GARRISON.SECONDARY‏.‏SCHOOL
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Your answer: 62
Explanation:

betty from United States
School: south oldham middle
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Your answer: 62
Explanation: Because you have to add 1+1=2, then 2+1=3, so you are always one less operation then the result.

Anonymous from Somewhere
School: Some School
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Your answer: 9 times 7
Explanation: because 9 times 7 is 63

Clifford from United States
School: Washington
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Your answer: 7 Operations plus 1 to remove the weight. 8 operations.
Explanation: Place 1 kg weight on the scale. Balance with one kg of wheat. Place weight on scale with wheat. Now balance with two pounds. Remove and add these two pounds to other side. Now balance with four pounds. Remove these 4 pounds and add to other side with weight and 3 pounds so there's eight pounds. Balance eight pounds. Continue process. 16 pounds, 32 pounds, 64 pounds, remove weight. There should be 63 pounds of wheat.

ariel from United States
School: bsp
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Your answer: 21
Explanation: 21 because 36/3=21
About Me:     girl

awesome from United States
School: Some School
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Your answer: 21
Explanation: 21 because 63/3=21

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