原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb, @, v$ x/ B7 t& }! f- L# P
the answer is -$97 for sure.
" |: }! [8 g9 S8 @5.39.217.76Think about it this way 8 A+ A$ z( G6 T
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
9 F) X; Z5 {, H/ }% @TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb9 S" i* {! l3 A! K/ }- [! k0 B4 r
公仔箱論壇' ~3 F( @9 `9 f& F( ~
TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。- j3 B7 b1 N. A& F0 _: M5 q
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
" T: b6 m- H$ b! b; z- pTVBNOW 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。
. w: S1 a+ e1 k# W% MTVBNOW 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.
" b8 A" Y' m, j" p公仔箱論壇 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。0 D1 _# d; z, I0 e- k% U
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |