原帖由 prozzy 於 2007-5-18 23:05 發表。 
5 G/ J6 `, a$ L. ^/ _/ ithe 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。8 @ M7 _. V1 f
Think about it this way
+ Z% g5 M. D2 }" e' j, e1 [- E1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
. B9 D# m1 ]' [2 H6 ?公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇7 M7 U7 k/ L) A+ Q2 C! C
5.39.217.76$ M& Y5 r5 C5 h$ [9 ^& l k. Y5 _
1 f5 E" D( a) Z" I& ^& H% H2 V, {5.39.217.761) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.76" V% Q ~1 p- r- D5 N" Q
) ], @7 C! q% o+ wthink 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 l8 k8 \4 j. Y; [3 ctvb now,tvbnow,bttvb tvb now,tvbnow,bttvb; k* Y1 S r. W3 R
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |