原帖由 prozzy 於 2007-5-18 23:05 發表。 
2 p1 B7 K# Y$ n" f% \the answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。+ x5 \* P$ ?: ]; y" w7 i
Think about it this way
8 N1 ]+ o. A$ C1 i* X0 Q) j1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
* {' ] b' q% F1 E/ m/ y2) Now, the owner discovered that the 100 bucks is fake. You can th ... 2 L+ _/ N* ^* q( g+ N; q2 Q* j- X- H8 [/ ]3 h
5.39.217.767 j5 ]; M5 f! G4 `4 i4 F0 G
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇" f' h( I: m& H$ L9 N& V
~5 A K3 q, A7 ithink 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.tvb now,tvbnow,bttvb- _. x2 l: p9 a' H) O! R9 \; \
9 e6 p/ J7 T& c9 V" ^1 Ttvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |