0 * 9 + 1 = 1
1 * 9 + 2 = 11
12 * 9 + 3 = 111
123 * 9 + 4 = 1111
1234 * 9 + 5 = 11111
12345 * 9 + 6 = 111111
123456 * 9 + 7 = 1111111
Kaynak: ReformTürk http://www.reformturk.com/showthread.php?p=113621
1234567 * 9 +8 = 11111111
12345678 * 9 + 9 =111111111




0 * 9 + 8 = 8
9 * 9 + 7 = 88
98 * 9 + 6 = 888
987 * 9 + 5 = 8888
9876 * 9 + 4 = 88888
98765 * 9 + 3 = 888888
987654 * 9 + 2= 8888888
9876543 * 9 + 1 = 88888888
98765432 * 9 + 0 = 888888888



999999 * 1 = 0999999
999999 * 2 = 1999998
999999 * 3 = 2999997
999999 * 4 = 3999996
999999 * 5 = 4999995
999999 * 6 = 5999994
999999 * 7 = 6999993
999999 * 8 = 7999992
999999 * 9 = 8999991
999999 *10 =9999990