Two interesting facts about the number 13:
76923 * 026 = 1999998
76923 * 039 = 2999997
76923 * 052 = 3999996
76923 * 065 = 4999995
(i) (1 / 13 ) = 0.076923076923076923076923...
(rational periodic infinite decimal)
On multiplying the periodic number 76923 by successive multiples of 13, the following curious numerical pattern is obtained.76923 * 013 = 0999999
76923 * 026 = 1999998
76923 * 039 = 2999997
76923 * 052 = 3999996
76923 * 065 = 4999995
76923 * 078 = 5999994
76923 * 091 = 6999993
76923 * 104 = 7999992
76923 * 117 = 8999991
76923 * 130 = 9999990
(ii) The numerical pattern abcabc is divisible by 13.
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