原帖由 prozzy 於 2007-5-18 23:05 發表。  5.39.217.762 h9 r/ m; |( w
the answer is -$97 for sure. 公仔箱論壇6 g1 l: [2 R5 F9 s8 |7 ^" P
Think about it this way
9 N9 {( |2 P+ n/ Utvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
2 V+ C, S' c0 L9 V& yTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ...
& c4 M3 J2 l4 D) f5 c) D6 z
5.39.217.76- V1 D, v2 k' T6 q
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
) A7 X& v0 v" @9 U
1 m$ P6 v/ b1 ?1 \! S9 R公仔箱論壇think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.76! o- g$ H W+ k2 Y. J: o
TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。2 }% a6 ^3 J) l- y1 |9 M
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
| 
發表於 2007-7-11 03:19 PM
| 
