原帖由 prozzy 於 2007-5-18 23:05 發表。 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 L" O3 H/ @: a' A# T2 f$ G
the answer is -$97 for sure.
( r) C2 F$ S+ {3 c3 X公仔箱論壇Think about it this way
( d, V! |6 ^. e4 u5 |5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇6 ]0 q. L2 V5 g$ O" Y* z
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5 {$ W' b' b% U5 s, @公仔箱論壇+ g& w$ q3 j5 I% o2 H% q7 ^/ m; g, L
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。5 ~9 ~( P+ k0 z
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
7 V5 b, D8 I$ r% k, ?3 x公仔箱論壇 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 h0 S7 V) ^ p
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.
* K( \3 f) ?9 L- {0 ^5.39.217.76 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。" x9 t7 q. a ^' I
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |