原帖由 prozzy 於 2007-5-18 23:05 發表。 
0 S# C; B6 O! N' athe answer is -$97 for sure.
& B7 O, ]# {) V/ l/ J: E6 iThink about it this way ) n: R- L# A! E8 {5 f
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
3 P: m' u+ v' d6 e% J+ |% k5.39.217.772) Now, the owner discovered that the 100 bucks is fake. You can th ... " r( |1 A6 v, W
, [; C. _% u0 V% `公仔箱論壇
8 R4 z! y! n. k9 }1 }* H$ |- W# i公仔箱論壇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。6 }6 ]( I, G2 t+ t: }1 U, x% b
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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.
6 E* Z8 a5 S! L1 z& `tvb now,tvbnow,bttvb 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。 q6 K9 N5 }9 }4 M- U5 y
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |