原帖由 prozzy 於 2007-5-18 23:05 發表。 
: A$ Z v5 y- A# P9 uthe answer is -$97 for sure.
4 D# W" E. c- E# O公仔箱論壇Think about it this way 5.39.217.773 j* P- j( h. U- n8 k
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇0 ]9 J( m6 M4 b0 y* [- H2 ^
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.770 }" x9 l+ |4 ]1 E: \
# z" Y4 n2 J/ \( Y4 M 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。6 n* }' f( E# V: Q( m
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。7 V& m+ w4 ?5 {1 Q7 V
7 c! f( j1 @6 h1 [; `* T3 Jtvb now,tvbnow,bttvbthink 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.9 A7 O- J) b) X- w% U1 x" s
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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. |