Divisibility tests with weighted digital sums

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We propose a divisibility test for all integers which have 1, 3, 7 or 9 in their unit's place. In particular, then, the test applies for all prime divisors except 2 and 5.
7 pages, Latex, no figures

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General Mathematics

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http://salesiana.dossiersoluciones.com/handle/123456789/75639

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0507011
 http://arxiv.org/abs/math/0507011

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arXiv