原帖由 prozzy 於 2007-5-18 23:05 發表。 0 G+ h5 c6 h$ ]& g4 c2 U M
the answer is -$97 for sure.
- v& i$ o" N7 |7 SThink about it this way . u" I. W. [& m$ L+ S' R P
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
& D# ~+ T7 T; E5 G8 ?0 Vwww3.tvboxnow.com2) Now, the owner discovered that the 100 bucks is fake. You can th ... 0 U! T. H0 \; F- d& ftvb now,tvbnow,bttvb公仔箱論壇. S5 Y5 Z/ Z( L- v4 \2 K
- c Y5 m* e b( i4 x. \5 ^+ Q1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
: x* V# k! d8 h: i; R; M% b( wwww3.tvboxnow.com
) x3 M! y$ Z6 L5 B2 S6 P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.tvb now,tvbnow,bttvb0 y0 @) n2 W+ G3 Q3 \' @
" r5 O5 [- b: G2 [% W& X7 ?% R7 ntvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |