原帖由 prozzy 於 2007-5-18 23:05 發表。 8 X7 ~- ?0 Z2 R# M$ K6 Y
the answer is -$97 for sure.
2 a, o3 u- T* n: f0 f/ J" [Think about it this way
2 h' H u: v8 w3 ~ ^: DTVBNOW 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。1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.777 v" O3 r( g# W, D% R
2) Now, the owner discovered that the 100 bucks is fake. You can th ... & W* @7 b3 ]# T5 f$ S5 Ttvb now,tvbnow,bttvb: w# b, n% `% `3 g Q
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。* \: F) r% ^0 d" _" j* b
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
3 D% {& r+ |$ K% Q# h/ 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。 tvb now,tvbnow,bttvb: ~6 I& ~6 @: L. J
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill. m. d$ k/ @1 g
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |