原帖由 prozzy 於 2007-5-18 23:05 發表。 
, R6 P+ ?8 R$ t: dthe answer is -$97 for sure. ' u( F, H: ~1 `& [3 t, b/ @
Think about it this way ( G! T: O- X% `+ i) {& e" n
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)www1.tvboxnow.com9 s! k. x) q6 s
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 3 Z1 o. j2 @6 i% W
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: E1 I+ P6 V6 c) u% f3 ITVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong ^- x. _1 |) C( |. E$ I
公仔箱論壇, `$ l: u" m$ C9 p# c( r( h
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.www1.tvboxnow.com9 ]" H' @* ?6 [* ^" }# G
; |, V- ?4 E1 D1 l+ zwww1.tvboxnow.comI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |