原帖由 prozzy 於 2007-5-18 23:05 發表。 
9 g% e% n& d9 R; q5 F" P A公仔箱論壇the answer is -$97 for sure.
# H# P3 b9 j6 K0 z0 i* ]Think about it this way
, s. u7 V* {' p, D5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb$ @) L d# w8 c: ^& y* d
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
+ ]# a9 B, G! _0 F5.39.217.76
# c/ y; r! p& l9 m. ktvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
& p5 f+ m9 i6 U4 J% ` j公仔箱論壇
4 o. [4 l6 M, `# k5 B; y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.
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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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