原帖由 prozzy 於 2007-5-18 23:05 發表。  + h4 e+ Z0 T' }9 |! `2 [
the answer is -$97 for sure.
% Y4 T0 ?) H& \, U. @7 G: uThink about it this way
4 l0 d6 d5 a# o: V) b, W. l$ Q; g1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.77& u! R+ a! D/ S
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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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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5 w) G1 q; _* d( n0 Mthink 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.
$ i" G- w& c- B: ]# G7 ]$ q5.39.217.77
9 N5 x# x( p1 r+ m) r6 z9 n e4 a公仔箱論壇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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