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It sounds like you’re referring to or her classic More Puzzles to Puzzle You – both of which are famous for logical reasoning, math puzzles, and lateral thinking problems .

You are allowed to (without looking inside) — and from that single observation, you must correctly determine the contents of all three boxes. shakuntala devi logical reasoning book

If you want an , here’s one: Puzzle: The Three Boxes of Fruits There are three boxes , each labeled incorrectly. It sounds like you’re referring to or her