原帖由 prozzy 於 2007-5-18 23:05 發表。 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。! \* r# E1 A2 N1 j8 M7 I' g
the answer is -$97 for sure. 5.39.217.77:88980 u1 F; ]. [: c9 {8 b3 ]8 q& K
Think about it this way
+ ?8 K7 o6 z1 ]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。1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1 A8 \! Q6 E: j0 W$ p2 X$ H
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇% y. n" }2 t) I$ z
5 [4 f6 p' q) b x4 Z9 N5.39.217.77:8898 1 j$ N2 c! O$ E$ f
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
9 p4 Y9 a& i) a% u; M/ uTVBNOW 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。 5.39.217.77:8898" w0 Q( r$ O% Y+ `) ]0 F
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.5.39.217.77:8898. Y" ^* ~. e# a. c" S, ~; I
2 ?* b% e2 D1 ~3 e: o; `" _I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |