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枫下家园 / 人到中年 / Interesting..1 X 9 + 2 = 11
12 X 9 + 3 = 111
123 X 9 + 4 = 1111
1234 X 9 + 5 = 11111
......
-mikesmith(老猫);
2012-1-28
{83}
(#7243482@0)
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1x8+1=9
12x8+2=98
13x8+3=987
14x8+4=9876
....
12345678x8+8=98765432
-sh20030(sh20030);
2012-1-28
(#7243513@0)