a b m a = mb. a b b | a ( : " "). 3|24 24 = 38; 7|28 28 = 74 10|10 10 = 101. b , a. b , , a . b a b |a a b.

. 10, 100, 1000, ... , , , ... . , 12300 100 . 2, 4, 8, ... 1, 2, 3, ... . 12345612345632 4 32 4. 5, 25, 125, ... 1, 2, 3, ... . ...7125 125 125 125. 3, 9, 27, ... . 5886 27 27. "" . , , ( ) . . 11 ( ) 11. 8684016 8,8,0,6 22, 6,4,1 11. 11, . 11; : 8684016 11. 101 101. , 7 96 89 , 7+89=96, 96, , . 101. 79689 101. 7, 11, 13, 77, 91, 143 1001 () () . , 539 693 385 539-693+385=231, 7, 11 77, 13, 91, 143 1001. : http://sr.wikipedia.org/sr/