原帖由 prozzy 於 2007-5-18 23:05 發表。 
3 [# Q' Z1 v. I1 ] Pthe answer is -$97 for sure.
! g# G: A5 P# F. y8 X9 ?5 p5 E5.39.217.76Think about it this way 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。. ?/ i: v" L K8 ]5 M7 _4 D
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇+ {' P0 Q* Y: d: T+ n8 V
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.768 M, N0 V3 [5 g7 e) S
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: ?$ H' y/ F8 w6 L. ^ J, 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 wrong
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! z* O# W p+ K- _6 j$ o( @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.7 \- }: D, [1 J
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。4 ?7 W4 f% i3 _( F" B
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |