原帖由 prozzy 於 2007-5-18 23:05 發表。 
% e9 I- v- r3 p. T4 f/ ?$ v& ITVBNOW 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。the answer is -$97 for sure. 5.39.217.76; Y) x, ]8 a5 O: U& s8 |
Think about it this way 公仔箱論壇( q( Q% K6 k8 G6 q
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。- n# _! y1 x: H B
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ) N: o7 k8 r5 ]! Z
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公仔箱論壇9 _8 w3 b/ k, u: e" T' Q
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
+ {, M/ D; @3 ]" ? 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。4 e7 L+ s& E# ?7 G4 Y0 G- o
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
) p- I$ w) Q& @' K 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。( {; f8 B( N! L7 i- O
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |