原帖由 prozzy 於 2007-5-18 23:05 發表。 8 m% Z4 v8 |: p }& d: N2 D$ C
the answer is -$97 for sure. 公仔箱論壇0 o% S: [ ]6 f5 O
Think about it this way
8 M1 V# Y3 ~$ |$ }* C% L5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18) i) }; a& ^# X2 k
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 5 |5 S2 f1 E B( x公仔箱論壇
3 W1 ]/ ]- i$ r- H6 }: s- ~6 v公仔箱論壇
! X& V$ T5 b; N6 p$ U5 r* P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
2 `0 f- `6 L B+ |, STVBNOW 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。
5 h' }1 ?% A& c; mTVBNOW 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。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.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。) W! T3 f- w3 d( o9 l3 |8 Q: t, H6 ]
4 N7 b; ]6 H3 e ytvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |