原帖由 prozzy 於 2007-5-18 23:05 發表。 
/ _. C# Z8 x4 s+ m. i- Ethe answer is -$97 for sure.
7 G$ S* H: S9 X, j: m& vThink about it this way , L# I* B0 F6 m* l% `
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
+ E, l7 p2 t6 E0 p/ d( c. Z# H# Y2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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tvb now,tvbnow,bttvb2 Q+ \8 @/ U2 v
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
" a" Y' q. ]$ Z X公仔箱論壇
4 b& Z9 H1 E8 U, T. r( B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.2 p/ J4 t- d3 u) c# R/ D, o9 P
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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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