原帖由 prozzy 於 2007-5-18 23:05 發表。 
- u: g+ i8 o9 \) W3 k2 j4 F" {the answer is -$97 for sure.
! Q& A Z& B9 x/ r' S% F O0 \Think about it this way - n0 u+ ~( P n7 {
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76# H3 D. f$ C7 s9 E4 B9 z" U+ b
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/ z2 s; X+ [3 L. p( I
9 o# D. @0 U& U& _* Athink 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.公仔箱論壇& g, @1 {4 @ j" Q+ I; x1 u
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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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