原帖由 prozzy 於 2007-5-18 23:05 發表。 
- s* g) F% B" g4 T# cTVBNOW 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。the answer is -$97 for sure. 5.39.217.76' F1 e* h, T0 S; k
Think about it this way 5.39.217.76( E" k& u4 b7 Q8 e2 {; h: Q
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)" V z' k I% [; E- v% U
2) Now, the owner discovered that the 100 bucks is fake. You can th ... + f2 Y5 f C* X! y8 O& z/ ^, H
- e) W2 q% z' CTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。 公仔箱論壇( | i* n2 N6 D5 { u1 O+ h/ m+ l2 M
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong v2 }' l" L; l& D: q
7 M$ k! Y1 m, q( C( x- F9 h公仔箱論壇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.
4 Y6 i H! e7 G, k: x* ~" i公仔箱論壇 tvb now,tvbnow,bttvb, [" e1 [2 y8 o! U6 F
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |