原帖由 prozzy 於 2007-5-18 23:05 發表。  8 d) _" P6 P- H" J% \" Q$ I
the answer is -$97 for sure. ! z' d. y8 }! C' T c
Think about it this way 7 ~5 s1 v" n" R. B4 ^/ f( B
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
S! F) ?! ]1 a5 l: o2) Now, the owner discovered that the 100 bucks is fake. You can th ...
g ]( H5 n3 N' w# K% ^ 公仔箱論壇$ X5 H% j3 |' s+ [
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
9 `( G, _& c* Y$ u! [: U公仔箱論壇
" n5 d9 R( D/ ^2 r# B/ `- h! X' J l公仔箱論壇think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.) `/ y! k$ {" _% W! R
" y! e) T' d$ |( F, z( D1 r q9 T! hI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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