原帖由 prozzy 於 2007-5-18 23:05 發表。 
' E; ?$ I8 G9 a. S, cTVBNOW 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. 公仔箱論壇' S0 j% l0 r0 r' D) }9 i- W4 v
Think about it this way
" P2 `5 c9 F8 e( e d1 k' d5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)! i: V3 {6 \! g4 P) v: ^
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 9 z* N6 b5 B9 X2 s: y- q, S5.39.217.76公仔箱論壇6 ]( w- u5 a4 C; `; K! {4 d- z
$ F% J" o3 D: U+ `/ M公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
9 A+ S1 F% m) t2 f( |9 r+ k6 aTVBNOW 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8 b% V/ u+ F6 A( n$ Y1 }' a# p& c
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.5.39.217.766 p9 f; i. d" _6 `1 [7 ]/ p
+ }6 f( O! f1 n) \I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |