原帖由 prozzy 於 2007-5-18 23:05 發表。  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。0 J/ _; E" `' |2 ]) A1 m
the answer is -$97 for sure. 2 L. E. e* l, o) }/ d6 _7 G# r
Think about it this way - o$ _ `$ |1 ~1 L: c
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
9 ~2 g( ~! k$ I/ v6 o0 ^3 j$ X公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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. w6 O7 W& l" E9 J公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
) y# ~( a$ R7 E2 L% V7 n9 k" p- `公仔箱論壇 公仔箱論壇, o& ^* t8 A9 d
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.% R0 O' h: N; i5 l8 a4 N
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。7 c: E5 F l. _7 }& x2 ~) T5 |
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 2007-4-9 06:27 PM
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