原帖由 prozzy 於 2007-5-18 23:05 發表。 
, p; \) s% ^9 J, R1 F4 W' k% ~. Othe answer is -$97 for sure.
N6 e \/ |2 S$ ctvb now,tvbnow,bttvbThink about it this way tvb now,tvbnow,bttvb7 G3 ^ l* Z$ h" j
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。6 G& l0 y& ^: ]/ r% W) j2 W" M; ?# n
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 1 M$ p" K' C6 I# O" v* K. [5 z4 p
公仔箱論壇4 Q: I# _$ S+ r6 G3 O q
1 k9 A& ^( I5 T) f0 r* e0 q# A8 T; j1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
" N0 q: ^$ ~0 s5 d 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。 d2 F+ Z! G: y# U
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。$ N; b$ ^7 M- H& `( k# R, x
0 p% Z& F! S5 g4 c. \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. |