原帖由 prozzy 於 2007-5-18 23:05 發表。  # s% G% U- O5 n: ^3 f
the answer is -$97 for sure.
( \7 b9 g' j7 S2 A' ^/ [公仔箱論壇Think about it this way 5 g- y4 K. m0 C6 f/ u+ ]9 U3 d2 s
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
% o6 ^3 ~. P) B; zTVBNOW 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 ...
( \" r ]& t% o5.39.217.761) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
' B" |9 c# G. f) V d9 t5.39.217.76 公仔箱論壇, g) b" \4 i" Z9 A( 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.
/ z3 m3 m) K* e" p" Ttvb now,tvbnow,bttvb 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。7 e% n' g* [& n( j% z4 B) I
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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