原帖由 prozzy 於 2007-5-18 23:05 發表。 
0 ^% S5 v6 ?. P$ J" ~( T# }5.39.217.76the answer is -$97 for sure. 5.39.217.763 ~+ r* ], {- }' {( p+ _! L
Think about it this way 公仔箱論壇7 `$ [% j% s& H0 h$ s" F a
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)2 ~: C( I' U. E) `6 M( K
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 7 y+ \6 j' o% K+ ptvb now,tvbnow,bttvb5.39.217.76' m2 a9 g1 n, U; \
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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 wrong
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1 I3 p# f# r2 o/ b. W! Y5 P5.39.217.76think 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,bttvb2 [2 G8 X5 X& G' I. e2 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。% n; f% e# W/ t6 K. c+ k
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |