原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇# }9 ?* r1 y1 t) w
the answer is -$97 for sure. tvb now,tvbnow,bttvb1 I% V7 r1 N) |& j" G
Think about it this way
2 j, D0 E8 T- i; n! _5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
, l v! b+ t, I$ ?1 B2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5 d2 \' ~. q; ?. z z3 ]* ~
0 [2 i) E) t$ x% T. y- ~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。 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。, g- z. o& i. C# l
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
b4 m" K" ~0 E( x: G1 C3 l- N公仔箱論壇
# z. v2 {4 o6 G+ M! n: V5 V8 S( |% uthink 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/ a& F# Q1 O! J [' D
7 I) w% H9 `0 k4 i" e j2 F0 ?) rI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |