原帖由 prozzy 於 2007-5-18 23:05 發表。 
3 i5 i9 x* W; g* j( x' m! r公仔箱論壇the answer is -$97 for sure.
- w& j- N8 \6 x4 P) KThink about it this way
) l: ~- G6 ^5 W8 w& a/ A8 N3 Owww2.tvboxnow.com1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5 ~3 k( _: J( O( g& A& r2 J
2) Now, the owner discovered that the 100 bucks is fake. You can th ... www2.tvboxnow.com/ |7 } x# T% ^& q$ A$ M5 k
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, V8 Z, t. p" k$ ]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
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6 |* I i- P1 p; {" Y8 [tvb 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.
" L( F9 K" {3 w9 Ewww2.tvboxnow.com
7 H) w! z. ? J5 fI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |