原帖由 prozzy 於 2007-5-18 23:05 發表。 
% K* J, `/ u+ ethe answer is -$97 for sure. # r0 s! n T4 X% V( G; w
Think about it this way 5.39.217.77# Z( q9 Y- y8 a/ j% e4 U4 F q
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
l3 T4 v/ i6 i# h1 y/ x d5 o- l* B2) Now, the owner discovered that the 100 bucks is fake. You can th ... 0 E; t& G2 ~+ P/ T2 f+ K2 i- h
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& h. |& I7 {" D+ VTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb9 W1 | z2 q. z5 M
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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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; G3 y: f9 S9 I/ w. ?' e* @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. |