原帖由 prozzy 於 2007-5-18 23:05 發表。 
/ H8 V" u2 ]: W2 U" ]7 W+ 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。the answer is -$97 for sure.
2 ]* G+ `# d5 k3 n# N) l" Q' [Think about it this way 5 F' E) v9 N' w$ Z1 P' @
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
: }: a6 i9 F/ g& UTVBNOW 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。2) Now, the owner discovered that the 100 bucks is fake. You can th ... : [6 X/ ?8 _. G) e7 I0 @3 ~( M
8 K0 S; y: n3 j" k a: d5.39.217.76
6 E7 g! v+ ~0 u9 y1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
4 \8 v/ m6 o0 K5 \7 ^2 w5.39.217.76
* S( A( i! q1 d' c" ]3 t/ v( 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, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb) Y$ l5 O+ ]* ?2 q
0 |. k4 G' X) Gtvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |