原帖由 prozzy 於 2007-5-18 23:05 發表。 
8 \8 M) X5 _2 a) a$ Z/ E, q6 N7 Nthe answer is -$97 for sure. 5.39.217.76- J8 R# E* h& O. G2 z
Think about it this way / y6 C" F3 [% ?8 R
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76$ f0 j( P0 S7 [( i' l( K' M" X
2) Now, the owner discovered that the 100 bucks is fake. You can th ... * ?* ]5 o" Q/ k; zTVBNOW 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。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。0 B' T X; x* X G
! [' k6 b) p4 ~& }* t) r! p( Z公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.76( L; V, V4 w$ T) [1 G, j
5.39.217.76- F R; J- b$ ~+ D, m& C! D& Y7 @
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.) g& ?, Z- b+ E- o2 n
tvb now,tvbnow,bttvb7 z# j% V, J& p; @' t0 s8 h
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |