原帖由 prozzy 於 2007-5-18 23:05 發表。 9 k; o' i# q8 F
the answer is -$97 for sure. 公仔箱論壇% S, ]' R- U* [6 S# o
Think about it this way 公仔箱論壇! Q' `8 w4 K1 Z: G$ J1 f: t2 n
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)1 c' T a* r1 f9 x5 z1 X
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5 l9 B3 v$ h# ^$ P3 T8 A1 _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。; q7 _+ I. o" I, o) e" l- g+ C8 A- b
# Y; M# e9 O& D4 d7 I# b1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇3 Q3 P) ], w/ H O
公仔箱論壇, Q+ {2 M7 h8 z
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,bttvb1 G' }8 `" u' t4 @) O5 N4 U" M
7 y" T6 v9 X2 _& o: W& w2 Z公仔箱論壇I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |