原帖由 prozzy 於 2007-5-18 23:05 發表。 
: ^0 [& J, L8 RTVBNOW 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.
0 O4 K& z8 ?) c3 j, }5.39.217.76Think about it this way
( H; b2 b7 |2 [6 t1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.76; o& o# o$ E! S* |. C5 W# V8 |5 ]6 ~
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ( Z! \5 @+ Q2 R3 i: H0 s* F公仔箱論壇tvb now,tvbnow,bttvb6 v- v4 U* \: F
公仔箱論壇4 v" q& ~; n- c0 E, n
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.761 B, ?& x6 l7 y: U& E2 s
) ~6 U$ Y2 Q' c p( T& r* ttvb now,tvbnow,bttvbthink 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.
( }1 p/ a/ P# ?8 ]% e! \/ M O) g5.39.217.76 ) V7 q" |! L9 i7 A
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |