原帖由 prozzy 於 2007-5-18 23:05 發表。 
1 R+ {6 G- x e; A5 {2 K3 Xtvb now,tvbnow,bttvbthe answer is -$97 for sure. 5.39.217.762 H. k4 z# [: h- u" f
Think about it this way 5.39.217.76/ U$ M+ ~2 V5 A1 r
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇- e1 b+ h+ n6 U& p* w5 s" e: i
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ) x" O; M* h5 KTVBNOW 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。
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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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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.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。' j4 f3 J! n1 i2 d" p0 U8 q3 P
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |