原帖由 prozzy 於 2007-5-18 23:05 發表。 
9 Q0 a: M. z3 L公仔箱論壇the answer is -$97 for sure. 2 c7 r: T' p7 F; Y: k( f; K
Think about it this way TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。; P4 g2 O" y$ B7 G. u+ `/ e6 q
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)6 s2 ?* g7 m6 u
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
公仔箱論壇8 O9 j% [3 b3 s
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
2 j+ C. n. G8 y6 O5.39.217.76 公仔箱論壇$ f& s; |2 q7 M/ t3 c6 ?
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.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。. m. z* j- X5 V6 B. r7 u; r5 G
5.39.217.76* d! D' U9 [+ Q; m! K
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
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發表於 2007-7-11 03:19 PM
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