原帖由 prozzy 於 2007-5-18 23:05 發表。 
) S$ f5 I6 n) @" {; }* qos.tvboxnow.comthe answer is -$97 for sure.
c9 Q! h* l5 l5 jTVBNOW 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。Think about it this way 公仔箱論壇; g' Z. q! }! j b7 B, o/ n
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
; ?( E6 Q2 U# a0 k5 Q4 G0 Yos.tvboxnow.com2) Now, the owner discovered that the 100 bucks is fake. You can th ... 2 W, n' _) [% V# d+ f
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5 q1 B3 ~# U0 C0 W1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇0 e3 k/ a( ]1 `: z/ g( W! p
7 N% \& Q& s) ?) C. C: `think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.7 T& @3 |# ?3 W# D$ z
9 I& M; `/ p8 los.tvboxnow.comI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |