原帖由 prozzy 於 2007-5-18 23:05 發表。  9 r- _# _3 ]: Q& B$ W) p
the answer is -$97 for sure.
% Q# F$ z R0 }! i- ?Think about it this way
/ g( R& ]7 {6 @ t0 M; I; l3 ?1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
# {! E P6 k) g1 L+ N% @) p2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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: c; c$ \# N# c( e3 o) |9 gtvb now,tvbnow,bttvb1) 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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& j7 D( t, x9 j8 M公仔箱論壇think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb: [' {/ A, f* K8 S' {5 y5 O1 m
4 H" R$ g: W* j4 TI 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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