原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb' @) Q5 F7 u! o
the answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1 H" h2 c! N/ B0 k4 y e$ D$ z
Think about it this way
7 }6 y, `8 }4 l3 J+ J. S* z' utvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
0 i+ u- o+ G6 e, L; A+ }# S公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... ! w1 g9 W k% r& ~- X
5.39.217.76" l- ^1 Q0 ~7 i* W0 c
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb) a5 Y8 Z7 F* E% O4 W
TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。) N6 G$ X& ?- Q- [. f
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.公仔箱論壇4 N0 o. v% G, f: t2 i
: m4 }% f6 g$ y7 U# {4 B5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |