原帖由 prozzy 於 2007-5-18 23:05 發表。 
! o2 ^" O7 k/ g8 `$ |the answer is -$97 for sure.
- j. `& P5 e8 T2 f% @, X0 w! mwww1.tvboxnow.comThink about it this way ; t _2 L1 h1 W3 a/ F
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)" ^ G( V- A* x5 F/ ~4 }
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 4 |. M' p) ?/ D" S8 ~0 u! S9 k; p* Mtvb now,tvbnow,bttvbtvb now,tvbnow,bttvb9 a& O: ?; [ e/ e
# o8 c" c. ?- [3 [$ |TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb$ s& `' j, ? y$ c6 k/ Y5 W0 L
TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。8 \' r) k0 R6 P( w1 |
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.公仔箱論壇: H$ s3 g3 p* Z" J2 c
TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。" ]) a& U% v7 O1 `) B8 a! l+ p( B2 E* o6 u
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |