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2014-11-08T20:34:00+02:00
Numerele sunt : 2100,2162
2014-11-08T20:46:07+02:00
21ab divizibil cu 2=>b=0,2,4,6,8

a=0,6
2100,2160,2102,2162,2104,2164,2106,2166,2108,2188