原帖由 prozzy 於 2007-5-18 23:05 發表。 5.39.217.767 ^) K6 z1 f( b( o+ W& r
the answer is -$97 for sure. 公仔箱論壇7 ^; S0 j {2 L- i8 y% ~% N
Think about it this way 5.39.217.764 x/ ^! }4 w6 C' F
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
$ f/ }( [: N* e- i( jtvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.76 m1 h: ]1 Z0 w% q# b) y+ ]" d
5.39.217.767 ^* H; Q: Q5 ^# O; k
公仔箱論壇) g2 Q- \/ x2 ^
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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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.TVBNOW 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。9 u9 N5 a8 ]3 V7 F7 J8 u: g
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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. |