Beauty of Mathematics
have you ever noticed that;

1 x 8 1 = 9
12 x 8 2 = 98
123 x 8 3 = 987
1234 x 8 4 = 9876
12345 x 8 5 = 98765
123456 x 8 6 = 987654
1234567 x 8 7 = 9876543
12345678 x 8 8 = 98765432
123456789 x 8 9 = 987654321

now look at this;

1 x 9 2 = 11
12 x 9 3 = 111
123 x 9 4 = 1111
1234 x 9 5 = 11111
12345 x 9 6 = 111111
123456 x 9 7 = 1111111
1234567 x 9 8 = 11111111
12345678 x 9 9 = 111111111
123456789 x 9 10= 1111111111

and this one;

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

it was interesting, wasn't it?