Mini brain teaser: how weighing scales work?

Mini brain teaser: how weighing scales work?

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84 Brain Teasers with Answers for Kids & Adults - MentalUP

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How to weigh 1-100 kg with weighing balance using minimum number of weights - Quora

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How to Solve the Weighing Scale Puzzle, by Hein de Haan, How to Build an ASI

12 balls puzzle: Find one fake in 12 balls identical in 3 weighs

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84 Brain Teasers with Answers for Kids & Adults - MentalUP

How to weigh 1-100 kg with weighing balance using minimum number of weights - Quora