原帖由 prozzy 於 2007-5-18 23:05 發表。 
8 S2 p5 u6 ^) j1 v6 [" [, g5.39.217.76the answer is -$97 for sure.
; y" K! b) R; {8 ]" h5.39.217.76Think about it this way
- i8 p! @( k, c F8 e4 BTVBNOW 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-$18)5.39.217.769 F3 M4 j$ A: d' C* `
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 0 U/ [2 R5 ^5 D' C" p4 t* l0 |: e0 r- P* Z. [* T+ B) `9 f
公仔箱論壇& {, _- Z! ^- o* _$ Y+ L0 E
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇' f: M- o: E( M2 r
公仔箱論壇; }/ \2 ? a1 b1 g, k: g
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。8 G% ?$ k( z& q( V
o) l* w5 B3 A; u2 o/ F7 MI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |