原帖由 prozzy 於 2007-5-18 23:05 發表。 
; E: X7 m9 k. F+ u: v C$ K5.39.217.77the answer is -$97 for sure.
9 K$ i, _; |; ~1 U L+ nThink about it this way
: K, N" ?7 j6 Y! \0 f1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
' b- _4 \* X3 ?$ G$ l$ f+ [$ o: w' e公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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, |# J; G# _- l3 ?8 ~1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇" n. [) A% V8 r( V% p' b# F
; g1 `: J1 U* ~" Q8 p1 Q m5.39.217.77think 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.
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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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