magic square

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A square array of numbers arranged in rows and columns in such a way that all the rows, all the columns and both diagonals add up to the same total. Often the numbers used are 1, 2,…, n2, where n is the number of rows and columns. The example on the left below is said to be of ancient Chinese origin; that on the right is featured in an engraving by Albrecht Dürer.

http://www.vtaide.com/png/3x3-E.htm An interactive 3 x 3 magic square.

Subjects: Mathematics.

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