原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb+ T7 s2 P w4 [) t3 }
the answer is -$97 for sure.
. `0 |6 @3 R6 h5 D/ wThink about it this way / ~* n5 n" z9 j w3 E8 A
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
4 o$ d$ k! [! M4 z; y; ~2) Now, the owner discovered that the 100 bucks is fake. You can th ... & V4 S! F6 V6 J( J$ F- @/ [tvb now,tvbnow,bttvb9 X ?2 u% `. N4 s Z
* s; B. v$ ^+ C公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇( u, P K* J7 P$ r m' p
3 G' V4 Z1 s9 N2 J Ithink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.8 z0 q% s" i; m3 |
: `6 w$ O. k. l5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |