原帖由 prozzy 於 2007-5-18 23:05 發表。 
: \1 V6 U0 v$ N9 x8 S' Y9 b( xthe answer is -$97 for sure.
, I; Y4 ], A8 {& ^公仔箱論壇Think about it this way 7 b: M2 X, [7 i, p+ u( y
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76# \0 p- Y) I" A" Q+ U0 M
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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7 z7 v. t6 I$ \' M3 P1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong; E9 B% R0 \: M( f% ~
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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." N7 J0 V+ P! B- \) `
5.39.217.767 J6 i* b& G: J/ _( ` e
I 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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