2005/07/01 by Palash B. Pal, Pal, Palash B.
Mathematics · #FOS: Mathematics #General Mathematics (math.GM) #math.GM
paper · pdf · doi:10.48550/arxiv.math/0507011
7 pages, Latex, no figures
arxiv created 2005/07/01 · arxiv updated 2009/12/01
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.