原帖由 prozzy 於 2007-5-18 23:05 發表。  % u k4 ~0 b; O- E" f1 }+ z4 \
the answer is -$97 for sure. tvb now,tvbnow,bttvb7 I0 c; j: W o t5 t& R
Think about it this way 5.39.217.760 d* L0 F" D% c! R
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
3 y8 F) j2 m$ F4 J0 d0 H公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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 a- M1 o8 N2 A0 ^3 g3 t
% T4 n/ G) I5 z" R5.39.217.761) 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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5 J) l: H$ r( U* r1 G5.39.217.76think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.1 S6 n$ ~4 Y+ r5 P; g: e
5.39.217.76 ^/ R c$ w/ A2 u+ m
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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