原帖由 prozzy 於 2007-5-18 23:05 發表。 
7 j0 D4 V, P) F5 {the answer is -$97 for sure.
9 @$ n, {# p/ X t& T6 e% J公仔箱論壇Think about it this way
* E0 b0 c) F9 V- d1) 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。2 a# l, P: P9 X) q" _
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇/ ?& _* D' {. I. o( f( Y, p0 v
2 D) G5 G, K& O! 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。
! X; o. O, s1 O% F1 J& btvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
$ J/ Y0 P, a2 _7 l5 @tvb now,tvbnow,bttvb
/ a- Z5 E) U% @; L# w8 ?5.39.217.76think 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.
3 ~( Z% \: y @8 E0 d: M4 f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。* }" u" ]- [! B
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |