忘了把原题写完整，应该是：

用123456六个数组成一个六位数， 要求任何相邻的两个数互质， 能组成多少个六位数？

所有跟帖： 

• 回复：忘了把原题写完整，应该是： -sqgs- ♂ (112 bytes) () 04/13/2010 postreply 12:58:36

• 你有没有考虑 -SwiperTheFox- ♂ (20 bytes) () 04/13/2010 postreply 13:21:33

• 144 -jinjing- ♀ (79 bytes) () 04/13/2010 postreply 20:28:01

• no -SwiperTheFox- ♂ (26 bytes) () 04/14/2010 postreply 08:21:48

• 70 -jinjing- ♀ (220 bytes) () 04/14/2010 postreply 17:33:29

• You are close, but not exactly -SwiperTheFox- ♂ (364 bytes) () 04/15/2010 postreply 09:55:41

• 72=(5!-4!*2) -jinjing- ♀ (10 bytes) () 04/15/2010 postreply 13:26:38

• This seems to be the best solution, can you reveal details? -SwiperTheFox- ♂ (6 bytes) () 04/16/2010 postreply 09:44:10

• Thanks. -jinjing- ♀ (0 bytes) () 04/17/2010 postreply 05:17:39

• details? please! -皆兄弟也- ♂ (0 bytes) () 04/16/2010 postreply 12:19:17

• 回复：details? please! -jinjing- ♀ (221 bytes) () 04/16/2010 postreply 16:00:53

• 2*4!可以理解，5!仍不太明白。anyway, thank you! -皆兄弟也- ♂ (0 bytes) () 04/16/2010 postreply 20:55:59

• 回复：2*4!可以理解，5!仍不太明白。anyway, thank you! -jinjing- ♀ (161 bytes) () 04/17/2010 postreply 05:43:11