原帖由 prozzy 於 2007-5-18 23:05 發表。  公仔箱論壇9 T& a/ c" \& B( `. ~# U
the answer is -$97 for sure.
# D3 y* D9 ]$ V1 g2 U+ c* e9 y! JThink about it this way
# E3 B; I0 y' V9 z1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)$ |3 P: A7 s j% M, m3 }, h4 [! |
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
) x, w& E0 M0 a& k' b. S8 t
) E- B% ]0 T& o+ u/ d$ i8 K8 j& }0 w
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong* t$ q. \' o- p# U6 c; F1 e
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。. a l, ?7 [2 a+ l8 l5 k; T
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.
# v7 \( O6 f0 UTVBNOW 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。
) H% Y/ @" x* L9 c3 L5 L+ s6 Z# u9 I7 L5.39.217.76I 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
| 
