كتب الاستجمام والمقالات الرياضية
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الاستجمام والمقالات الرياضية (كتاب)
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Arithmetical recreations.--Geometrical recreations.--Mechanical recreations.--Chess-board recreations.--Magic squares.--Bees and their cells.--Unicursal problems.--Kirkman's school-girls problem.--Miscellaneous problems.--Calculating prodigies.--Cryptographs and ciphers.--String figures.--Three classical geometrical problems
366p. 21 cm
