Mini brain teaser: how weighing scales work?

Mini brain teaser: how weighing scales work?

Mini brain teaser: how weighing scales work?

Mini brain teaser: how weighing scales work?

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Mini brain teaser: how weighing scales work?

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Mini brain teaser: how weighing scales work?

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Mini brain teaser: how weighing scales work?

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Mini brain teaser: how weighing scales work?

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Mini brain teaser: how weighing scales work?

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Mini brain teaser: how weighing scales work?

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Mini brain teaser: how weighing scales work?

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Mini brain teaser: how weighing scales work?

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