原帖由 prozzy 於 2007-5-18 23:05 發表。 
& W j; N' g+ q4 fwww.tvboxnow.comthe 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。( j' T8 J: i* |! j
Think about it this way
" |7 ?, j# m1 H1 f' [www.tvboxnow.com1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb" ]" D- ]# w% P4 D! O5 m* F
2) Now, the owner discovered that the 100 bucks is fake. You can th ... www.tvboxnow.com5 V$ S1 C$ Z. J0 ?3 O' ~
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. F! p l, F% s* `: f) U" Htvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong1 s6 z; v( p) A9 b, ^) T
tvb now,tvbnow,bttvb% H; m! p7 r. v4 b" W) [
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb$ k; h! s6 k. ~9 H( a/ r
' f% E6 {8 U/ L A+ U$ o5 `I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |