原帖由 prozzy 於 2007-5-18 23:05 發表。 
% { C S$ H) _, v4 k" a9 P7 btvb now,tvbnow,bttvbthe answer is -$97 for sure.
$ |. P. n( x! h# q( ^% g6 D$ }/ vThink about it this way os.tvboxnow.com) A2 S- m* Z7 C" x0 t8 q, F% d
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇+ Z; E, \5 P5 y3 s; \. O
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 8 l! Y# n! C$ _
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公仔箱論壇' J- I! q& _5 w/ r
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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/ O9 e; a* ^" c7 C' I; d9 ?$ h/ i- a公仔箱論壇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.
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5 D# O% {. z- m6 j% h% Ftvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |