it is a zero sum game is $50 money is not fake.

Now it is a -50 sum game.

neighbor losts zero.
young man gain 15 or 21, depends on how you look at it.
so the shoe owner must lose x + 15/21 = -50.
X = -71/-65.

所有跟帖： 

• where is young man's $29 gain in your calculation? plus -抛玉引砖- ♂ (376 bytes) () 12/28/2007 postreply 11:47:34

• yes. it is either 44 or 50 depends on the accounthing of -pediatrician2- ♂ (179 bytes) () 12/28/2007 postreply 12:03:26

• 这种题目不管对错就是找找乐，还是儿医同学真枪实弹在 -抛玉引砖- ♂ (24 bytes) () 12/28/2007 postreply 12:10:46