原帖由 prozzy 於 2007-5-18 23:05 發表。 
7 t) G) |5 [. r: g5.39.217.76the answer is -$97 for sure.
" [4 [ W. n) V. R0 t5.39.217.76Think about it this way 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。8 L E, M* g1 \7 `3 K, _
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76- t3 L7 g N, H
2) Now, the owner discovered that the 100 bucks is fake. You can th ... $ D0 z Q4 @, m5.39.217.76' T0 H) B: n3 H1 _
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。$ b; ~1 k7 n; Z! g/ f( q9 d
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 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。% O9 e3 l% z1 W) i, z1 [
5.39.217.76! _( I* ]' S. T9 e
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.公仔箱論壇4 c% s& p, v; e) m# p
% l( y( C' K9 v/ W" t
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |