原帖由 prozzy 於 2007-5-18 23:05 發表。 
o/ t/ l2 y2 R. ~1 R- L. r9 M- ^tvb now,tvbnow,bttvbthe answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1 D5 O% N8 L) _7 G, Y: l
Think about it this way tvboxnow.com) X; `8 U/ l3 h: T2 r5 y$ d( Q
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
. p+ y: e* ~* X8 e. w公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb; P; Z" a/ s+ _1 b2 H) n( ]9 k t. S. D9 j
# H0 U) x' {' Q3 e4 C) {) oTVBNOW 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。
7 z7 y; _2 l( ^tvboxnow.com1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb, Q3 b' o0 Q* W% u9 F' s
% |) p7 h% P/ n/ \8 G. j. gthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb" ]% V( i* g7 H5 u9 \: ^/ c# h
* B' [$ _6 j' ^3 S; lI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |