SAP智力題--Hard to meet twice★★★★★★

Three trees make an equilateral triangle ABC. There are three mice a,b,c. They began to move simultaneously at the same speed, a from A to B, b from B to C, c from C to A, not necessarily via straight routes. Each one moved closer to its individual target by each step. And eventually everyone reached its target at same time. During the process, a and b met twice, b and c met twice, c and a met twice. Is it possible?
----Designed by Hansen Chen in 2009( https://www.sdn.sap.com/irj/scn/forum?forumID=410 )

所有跟帖： 

• 火藥味變濃，太難了 -Williamluo- ♂ (50 bytes) () 10/09/2009 postreply 21:00:18

• 回複：SAP智力題--Hard to meet twice★★★★★★ -ppzz2009- ♀ (121 bytes) () 10/10/2009 postreply 18:08:37

• "Each one moved closer to its individual target by each step"? -morefun- ♂ (0 bytes) () 10/16/2009 postreply 12:16:22

• 回複：回複：SAP智力題--Hard to meet twice★★★★★★ -vdonkey- ♂ (72 bytes) () 10/19/2009 postreply 02:30:19