原帖由 prozzy 於 2007-5-18 23:05 發表。 
1 R4 F; d4 I* M; Y8 S& |) O' M8 W$ c公仔箱論壇the answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。9 ~4 Y1 a( E9 ?- C$ n3 o( A3 P
Think about it this way
- e8 ~% Z; G+ V/ K2 Z5 f1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb: i' `6 h5 ^( S9 O: ~( b
2) Now, the owner discovered that the 100 bucks is fake. You can th ... , G, Z+ Z3 Q) I- [% z# ltvb now,tvbnow,bttvb
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2 }( ?4 p. ]. L4 B' p L
( h/ ]* _! A% c( [$ Ttvb 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.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。3 K( P8 d* [ n, [5 R! v4 i
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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. |