Interview Question

Machine Learning Scientist Interview

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Amazon

How do you weight 9 marbles three times on a balance scale to select the heaviest one.

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Interview Answers

3 Answers

0

Do they all have the same weight except for one?

Paolo on

0

I think the question is the rest of the 8 balls are the same weight. In that case you can find the heaviest in 2 tries.

Xiaoshu Liu on

2

First weight 4 vs 4. If they're the same => the last one is the haviest. If not, weight 2 vs 2 of the haviest 4. Then weights 1 vs 1 of the haviest 2.

Aaron on

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