原帖由 prozzy 於 2007-5-18 23:05 發表。 
& d- f# {5 k6 B6 p: l5 v: _) F7 ]the answer is -$97 for sure. / P u1 F. ?0 ^) T0 \. @; m. D
Think about it this way
5 {% I/ f! n' a. g& q: Y# E1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。# o; Z. }8 c) _$ c7 j8 Z- f
2) Now, the owner discovered that the 100 bucks is fake. You can th ... - X4 Q ]* ~% _* G0 e$ c" MTVBNOW 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。
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
3 i$ s$ c: t I: 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。
, u1 J8 ~. D- c# J$ X1 e Mtvb now,tvbnow,bttvbthink 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.# R/ e8 H/ l8 v1 f7 C& C z
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |