原帖由 prozzy 於 2007-5-18 23:05 發表。 
& i" d1 {7 [7 W, l [; T% atvb now,tvbnow,bttvbthe answer is -$97 for sure.
$ H$ o( J/ _( |6 \+ ^Think about it this way
' ~' U% ~/ Z3 u# y) f公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb: { ]# Y+ G$ J9 ^/ L
2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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7 b6 H# T6 \ h' t; T8 {( G) z; R0 ]. q1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
- z8 n6 ]1 x. H. n0 U. P2 I- M, i3 Ftvb now,tvbnow,bttvb
& N2 J& C4 @7 Y- }- E0 B( }公仔箱論壇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. ^0 J; O% _! y- q6 Y& A4 M2 C
tvb now,tvbnow,bttvb ?0 B5 ~' v2 v/ o
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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