Place 3 blocks on each side of the scale and see if one side is heavier. If both are eqaul use the scale to check the remaining 2 blocks. if one side drops, take 2 of the 3 block and see if they are equal or if one is heavier.

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Interview Question for Electronics Technician at Schlumberger:

Given 8 blocks that look like they are the same size but one is heavier. Find the one that is heavier by using a balance scale no more than twice.

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