原帖由 prozzy 於 2007-5-18 23:05 發表。 
# ^( l: ~. y. ?the answer is -$97 for sure.
# U/ n) r" [: r* c: K( Vtvb now,tvbnow,bttvbThink about it this way
& f# y* }3 B: Z9 t- w: }5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
2 ~7 R1 w) z+ o1 e& D( ~5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ...
7 p i1 d# m! q# t( S公仔箱論壇 TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。& d/ f. |/ ?( {/ J3 Y
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
- S, c3 a, p" m1 x% ~' ]$ ^5 k8 JTVBNOW 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。 公仔箱論壇5 s. W! U, v( {9 f5 B3 Y# M
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.76. y$ |- s/ Z' M7 w' P; ~' d2 F
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。) K& y5 C# Z I
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 2007-7-10 05:18 PM
| 
發表於 2007-7-11 03:19 PM
| 
