جالبه نه ؟
88=7+9×9
888=6+9×98
8888=5+9×987
88888=4+9×9876
888888=3+9×98765
8888888=2+9×987654
88888888=1+9×9876543
888888888=0+9×98765432
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11=2+9×1
111=3+9×12
1111=4+9×123
11111=5+9×1234
111111=6+9×12345
1111111=7+9×123456
11111111=8+9×1234567
111111111=9+9×12345678
1111111111=10+9×123456789