SAP智力题-----A specail mouse

There are 12 mice, only one of them has a different speed to eat cake. How many cakes do you need to find out the special mouse? How about 5 cakes? What if only 4 cakes?
(Note: when you let mouse A eat one cake, B eat another, if A finishes firstly, then A is faster than B.)
https://www.sdn.sap.com/irj/scn/forum?forumID=410

所有跟帖： 

• Only one cake is needed, cut into smaller pieces! -Windows8- ♂ (0 bytes) () 06/11/2009 postreply 10:12:06

• 5 yes 4 no -Windows8- ♂ (120 bytes) () 06/11/2009 postreply 10:27:12

• just need 2 -zoude- ♂ (0 bytes) () 06/13/2009 postreply 11:00:24

• 不明白,不明白你什么意思,不明白你明不明白 -Windows8- ♂ (0 bytes) () 06/17/2009 postreply 14:45:56

• 回复：5 yes 4 no -soforwhat- ♂ (27 bytes) () 06/29/2009 postreply 16:46:33

• 1 toxic cake - the one lives longer or dies faster -CsA- ♂ (0 bytes) () 07/08/2009 postreply 06:28:39

• 回复：SAP智力题-----A specail mouse -嗜睡虫- ♀ (203 bytes) () 07/08/2009 postreply 22:57:06

• Sorry, 问题看错了。 -嗜睡虫- ♀ (0 bytes) () 07/08/2009 postreply 23:09:17

• 3次 -东瓜太郎- ♂ (20 bytes) () 07/23/2009 postreply 15:07:38