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Бипросте число

published at 2/2/14, 1:07:54 pm

2*2 бипросте?

published at 2/2/14, 2:00:02 pm
  1. 2 * 2 = 4
  2. 2 * 3 = 6
  3. 3 * 3 = 9
  4. 2 * 5 = 10
  5. 2 * 7 = 14
  6. 3 * 5 = 15
  7. 3 * 7 = 21