原帖由 prozzy 於 2007-5-18 23:05 發表。 / {2 x k- c# d5 \) l& l' C
the answer is -$97 for sure.
8 `; U! u5 q; z: `- Btvb now,tvbnow,bttvbThink about it this way tvb now,tvbnow,bttvb0 o) k! P7 R5 i
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)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。& I `0 N9 X0 y/ y3 n
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 0 }# U; V; H6 `% m; |& r公仔箱論壇tvb now,tvbnow,bttvb% Y) @" S; z. ~1 g; A
5.39.217.76 E7 q. @! C! |! v z0 g7 }' y
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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7 ^& k+ B4 t6 H2 ^2 E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.7 @% y6 K# w. ?& }) W( f
2 f6 b6 k1 Y% y; Ntvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |