回复：请讲一讲你的解题思路。谢谢。。。。。。

来源: 于 2005-02-05 13:26:05 [旧帖] [给我悄悄话] 本文已被阅读：次
You're welcome.For 135,we have 135+153+315+351+513+531=333*6.The reason is the same for 13579. For 12567,(1+2+5+6+7)/5=4.2,we also can get 4.2*(120+1200+12000+120000+1200000). 120=p(5,5)=5!.But for some digits are same, we can't do like that.