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23#
發表於 2009-3-26 01:29 PM
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pure math
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[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y公仔箱論壇3 b. E7 j* y1 I' k3 O0 G
9 k% m+ i4 g4 Tif x = 111 y = 2222, you number is 111-2222 |
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