原帖由 prozzy 於 2007-5-18 23:05 發表。 
4 t1 G2 L+ t: P8 r; gTVBNOW 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 -$97 for sure.
+ S9 o( S; G$ f- h5.39.217.76Think about it this way 公仔箱論壇0 J+ g& ?. {5 {8 d
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
: R0 @" P9 I, L0 U% h9 Q- g5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ... 6 u+ G( C3 J2 a6 T# ~* q* xtvb now,tvbnow,bttvb
: d) _7 |) E4 ~0 \' T$ e# x5.39.217.76 tvb now,tvbnow,bttvb0 {! ~+ C' t& x2 {
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 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。8 O }$ I' a5 g& l3 a
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill., _2 n' V$ {& s! J' H# Q
; k% z$ K9 u- w* z. |! R. v/ K btvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |