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DK-GEORGMOHR 2003 Problem 5

    For which natural numbers n≥2n\ge 2 can the numbers from 11 to 1616 be lined up in a square scheme so that the four row sums and the four column sums are all mutually different and divisible by nn ?

    Dataset text AI-MO AoPS. Quoted with source.

    Official text: Georg Mohr Contest 2003 official paper, page 1.

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