原帖由 prozzy 於 2007-5-18 23:05 發表。 
! p8 L h0 j- }9 ]0 _* R7 p2 VTVBNOW 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 -$97 for sure. 公仔箱論壇8 g: i" `& [$ b: o- G) K" w- A6 N/ M% Z
Think about it this way 6 K( y' E# M' }
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。- Q1 [7 A% d' O6 H
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇: {+ w, r& z# h' f* W
TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。9 \# ~) B1 F% U4 ?
7 ^2 R; A& p: W3 d; l% z1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.76+ u6 v( x9 w6 M0 q
" [% y$ z3 x1 Y; n1 [$ gTVBNOW 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.# q; e1 _( J( ?
5.39.217.763 J! B0 w2 a9 F) z9 `) ?
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |