原帖由 prozzy 於 2007-5-18 23:05 發表。 
# m z1 k2 o9 h( Y) \% G, M! e; Q; nthe answer is -$97 for sure. " v% J$ H. _& |. r9 J# \5 l% l
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。* T9 S4 S) e. y. g
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
: o0 W7 j3 F; R" v4 O, NTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... |' z, H3 g! \8 j
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
; F7 {3 ?8 O$ B' L/ K: E3 ^# x2 U公仔箱論壇
# o% G" w# o; B! TTVBNOW 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。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.tvb now,tvbnow,bttvb9 f4 K) E, S! b+ x- `
$ A* u Y8 G9 W( H" E. A1 Ptvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |