原帖由 prozzy 於 2007-5-18 23:05 發表。 * m9 X( y+ f! j/ p
the answer is -$97 for sure. tvb now,tvbnow,bttvb; z7 A8 ?1 ?7 X: R! S
Think about it this way
1 U$ ]- p7 O f" m" ~5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
) G& I |) ~; B: U4 ]' \7 A公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb! x- F2 C7 G1 q6 k7 H8 O
: I- C! h: `4 `
4 [3 q; [! q: _- H
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong# V0 j# W0 F s
9 B. j# I+ h7 n4 @, s# d. Vtvb now,tvbnow,bttvbthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.76' |6 q" a- e" ]3 [# D. t1 |
tvb now,tvbnow,bttvb$ H7 d. H5 e1 g: }5 H1 |
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |