原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇. r/ N$ c" I- A$ c. q+ W
the answer is -$97 for sure.
- w4 b- c1 S! e. p; u* o, [ Btvb now,tvbnow,bttvbThink about it this way
' M" ~6 j, Q/ _+ N3 q1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)os.tvboxnow.com) ]/ s: ^, \( R- v0 b5 J# J: i9 j
2) Now, the owner discovered that the 100 bucks is fake. You can th ... + N- H) W" Z) O. o6 I/ F$ ?4 D公仔箱論壇
% y5 y+ i, W3 S. R4 e$ |: vTVBNOW 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 f* j+ x _3 v" T+ H! T5 r
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2 c. g7 Q; r2 ?2 I c1 f6 ]
公仔箱論壇; H! t A9 Q. l; U( ]
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.公仔箱論壇9 m, R9 S/ U) K: ^! \% Y2 Z' E
6 k H0 Y5 g2 x7 F0 Mtvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |