原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇# v/ X a/ H9 `+ a$ G# j: z" V
the answer is -$97 for sure.
5 q1 a2 l2 D2 } J公仔箱論壇Think about it this way . b' p; ~4 q9 `6 C' {7 L! v
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇5 m! \+ q0 ]/ S: ]
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ! I3 E, b* f3 H9 G3 Ztvb now,tvbnow,bttvbtvb now,tvbnow,bttvb6 @9 G, s4 |) I3 X$ ]
tvb now,tvbnow,bttvb; ^: R5 N( {$ Q1 U
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 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 S( u* R, K& Y
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 I. d: o( r' w* g8 s
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.
2 K9 a1 h2 p2 E8 |" iwww1.tvboxnow.com tvb now,tvbnow,bttvb) A4 ^: j+ @' f+ b: j+ c6 Y
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |