原帖由 prozzy 於 2007-5-18 23:05 發表。 
% N% w! G3 h/ z2 r1 L4 G0 [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。the answer is -$97 for sure.
; m6 X$ v) Q' X& Q- vThink about it this way
9 f9 J" j( n M公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
; q3 h% y' y3 j: j" I! D公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... 4 j* U1 K4 l# [* f+ H& x q
& p# G9 P, {- j6 o1 D! G2 {7 S" Q5.39.217.77:8898 5.39.217.77:8898$ s+ p* ]1 K% z: j1 a
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
2 _- F l5 Q/ ~. e8 e公仔箱論壇
7 M$ @3 ~! R0 R% s# N, \5.39.217.77:8898think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
1 d" l) Y2 e6 o$ J) t( Z 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。/ X; m1 \! p' g, ~, w W; T( b
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |