Square-grid number puzzles appeal to enthusiasts of recreational mathematics. This selection comes from the "Affaire de logique" column in the newspaper Le Monde.
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Albert Ayme left his engineering post in 1960 to devote himself to painting and sculpture. His scientific training led him to devise a combinatorial system of variations on the square, combining visual pleasure with mathematical rigor. He made the square magical!
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The final installment in our three-part series on methods for solving problems with a minimum of technical machinery. The aim is to discover an imaginative, original approach that shifts the puzzle into familiar territory.
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