原帖由 prozzy 於 2007-5-18 23:05 發表。 
+ Z9 l4 J% k' [+ ?* L# j* X+ A5.39.217.76the answer is -$97 for sure.
3 l# M. \& W( z3 r" p4 v. h! S: fThink about it this way
1 I7 x3 _0 k' q) E9 {5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
2 D% x6 x' }: Z7 w5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ... 1 p+ w+ n1 \4 n- i/ ~tvb now,tvbnow,bttvb
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* v4 f8 @1 }' S/ y# Dtvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
3 S/ N O) C% @' H# W9 y: _tvb now,tvbnow,bttvb
% k0 d. F" k$ }6 U j4 x6 W6 w/ Ftvb now,tvbnow,bttvbthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
) o6 k: W' x. w( \9 w( x) G) ATVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。
# D$ c; P, f2 y3 {- k Q. |tvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |