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Oil Field Service Interview Questions

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If you have a balance scale on a crane with 4 crates and you can only weigh two at a time, no more than three times, how do you figure out which crate has the least amount of weight?

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boxes: A B C D 1. Weigh a & b find the lightest 2. Weigh c & d find the lightest 3. Weigh the 2 lightest and pick the lighter box. this is assuming that all the boxes are different weights..

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