回複:南斯拉夫奧賽題:兩位數(2星)

There are two solutions:
15 and 45. 15*7=105, 45*9=405. That's all.

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回複:回複:南斯拉夫奧賽題:兩位數(2星) -markren- 給 markren 發送悄悄話 (22 bytes) () 07/06/2009 postreply 12:16:02

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