原帖由 prozzy 於 2007-5-18 23:05 發表。 
0 l4 M8 e7 ~4 I5 {) v! ?the answer is -$97 for sure. tvb now,tvbnow,bttvb4 z9 l7 t2 D3 i: X9 y) K) Y
Think about it this way
0 v- ~- i; x, @. f6 N1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
$ }5 ]; F3 v1 i. L7 V' s2) Now, the owner discovered that the 100 bucks is fake. You can th ...
0 z8 @0 |0 I( c6 @ 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 f x, Z" f* O. R5 |! l
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong4 t& o3 B2 U3 k& q1 Q7 Y2 [
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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.tvb now,tvbnow,bttvb' x( _! \# n- Z& R/ b( `- e
& U4 c" S2 U5 T; q3 M- a( BI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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