原帖由 prozzy 於 2007-5-18 23:05 發表。 
0 f# ]: Q+ r. w% z0 C( Ktvb now,tvbnow,bttvbthe answer is -$97 for sure. tvb now,tvbnow,bttvb M n5 w; L9 T3 S# E
Think 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。2 J1 A, `* S `+ w4 k& Q7 ~
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76) x/ t* g& I, c
2) Now, the owner discovered that the 100 bucks is fake. You can th ... + _" g) c2 C4 B4 ]: R/ _
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3 @% Y) E, k6 W: B1) 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。; P# @4 n6 z0 B* a b
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。! N! E+ X* a$ y6 ~ N! t
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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. |