Beautiful Math.
Edited on 29 Jan 2012 by Medo Hamdani 1 x 8 + 1 = 9 12 x 8 + 2 = 98 123 x 8 + 3 = 987 1234 x 8 + 4 = 9,876 12345 x 8 + 5 = 98,765 123456 x 8 + 6 = 987,654 1234567 x 8 + 7 = 9,876,543 12345678 x 8 + 8 = 98,765,432 123456789 x 8 + 9 = 987,654,321 1 x 9 + 2 = 11 12 x 9 + 3 = 111 123 x 9 + 4 = 1,111 1234 x 9 + 5 = 11,111 12345 x 9 + 6 = 111,111 123456 x 9 + 7 = 1,111,111 1234567 x 9 + 8 = 11,111,111 12345678 x 9 + 9 = 111,111,111 123456789 x 9 +10= 1,111,111,111 9 x 9 + 7 = 88 98 x 9 + 6 = 888 987 x 9 + 5 = 8,888 9876 x 9 + 4 = 88,888 98765 x 9 + 3 = 888,888 987654 x 9 + 2 = 8,888,888 9876543 x 9 + 1 = 88,888,888 98765432 x 9 + 0 = 888,888,888 Brilliant, isn’t it? And look at this symmetry: 1 x 1 = 1 11 x 11 = 121 111 x 111 = 12321 1,111 x 1,111 = 1234321 11,111 x 11,111 = 123454321 111,111 x 111,111 = 12345654321 1,111,111 x 1,111,111 = 1234567654321 11,111,111 x 11,111,111 = 123456787654321 111,111,111 x 111,111,111 = 12345678987654321