原帖由 prozzy 於 2007-5-18 23:05 發表。 
/ }) B/ o4 t. G2 e) @( Atvb now,tvbnow,bttvbthe answer is -$97 for sure.
1 T. F k2 E, ]# \8 I, P公仔箱論壇Think about it this way
% [4 Z8 |! G7 `, {公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
) [. J2 Z( |: _: d1 y$ y$ }公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇, l/ C+ p O) j' y
* O6 b4 a$ i" V! h4 J7 m# d0 d+ DTVBNOW 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。
; j- R! i u* {4 G& 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。1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
% g$ S' X% e5 @1 BTVBNOW 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。 tvb now,tvbnow,bttvb5 D8 g% ^& @1 T& o6 G
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.tvb now,tvbnow,bttvb& l; m3 l: v: l0 `9 q
5.39.217.776 i. a/ Y2 k9 y+ e4 r0 h2 w
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |