原帖由 prozzy 於 2007-5-18 23:05 發表。 
$ H" k) r: H+ P7 A! N- C8 y$ y% hwww1.tvboxnow.comthe answer is -$97 for sure. www1.tvboxnow.com% Y8 d8 F) \+ @5 D# c6 m5 F* w
Think about it this way
$ r& X y2 @& ~1 k" M8 i+ ~www1.tvboxnow.com1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)# K& } z: T. V5 s: f( G
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇) r+ a0 a9 t! ^' q8 |" b* J
0 ]1 L. t. p) M- E4 Z tvb now,tvbnow,bttvb5 }9 Z8 {5 y6 a; Q( B r9 e' U
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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; g" {% {) a' D1 Twww1.tvboxnow.comthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.公仔箱論壇% L3 P4 n. \( E4 e
- {' M: o4 H7 M+ P6 [/ n2 Itvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |