原帖由 prozzy 於 2007-5-18 23:05 發表。 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。: g! l; R1 W. b, ~( T7 G+ C+ Z& t, u
the answer is -$97 for sure. 5 Q4 ]: Z1 P! K. `& ^$ D
Think about it this way 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。& x# N0 p9 E2 q. Y. X! p
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。: R- x' x# W0 a/ M2 ~
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ! m$ k3 l: M. v) P6 I; rtvboxnow.com公仔箱論壇" z2 L2 P5 x% o- e9 t1 x1 ^; U
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。+ x. o- A# Y0 o; K; I
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
) _& R: j# Q' k' J9 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。 公仔箱論壇: p8 X( C# D+ h4 L9 z3 z# r _' t
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.6 M8 m- o( x' r3 C
tvb now,tvbnow,bttvb' z' m; |' ]: g {( F. l
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |