原帖由 prozzy 於 2007-5-18 23:05 發表。 
# C9 H- `, }7 A& S1 jthe answer is -$97 for sure. 1 s" E- `) j& k. K3 N
Think about it this way 1 q+ O2 ]+ W4 v4 x6 L# ?: [% `& M
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
+ I6 @& t' j; ytvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.76: t3 S) W" m$ I
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 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。8 y5 K4 L8 }5 s5 I: G6 w+ q. P- z
公仔箱論壇' a5 v9 \( f* ^5 @; H
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. |