原帖由 prozzy 於 2007-5-18 23:05 發表。 
8 S$ _$ L" {+ {" P- n6 n/ xthe answer is -$97 for sure. www2.tvboxnow.com4 e- p5 r% `: D% S4 }
Think about it this way tvb now,tvbnow,bttvb' E& b( X: o5 V# m$ a6 F. b# G
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
7 c' [, F9 O# S& Z! T, U& w( P1 B, ^$ C2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇4 S) r g1 z* Z- C2 t* l9 Y
5 @+ P8 j- {9 Y5 I C* W4 V# 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。
& t( Q; _" |9 T7 {: E5 S5 J( R/ Ytvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongwww2.tvboxnow.com" s4 }4 W: P$ R2 l5 l* V1 r
www2.tvboxnow.com7 |4 [$ c5 E* R! |* Z( y A" P
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.tvb now,tvbnow,bttvb: x( x, |* D0 B! c8 Z
" T) Y/ P3 s( [ j- i0 Q公仔箱論壇I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |