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Good integer (Posted on 2021-05-21) |
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We call a positive integer good if it doesn’t have a zero digit and the sum of the squares of its digits is a perfect square. For example, 122 and 34 are good and 304 and 12 are not not good. Prove that there exists an n-digit good number for every positive integer n.
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| No Subject | Anna Shetty | 2021-07-09 05:25:34 |
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