原帖由 prozzy 於 2007-5-18 23:05 發表。 5.39.217.76, ?) l+ X4 j* {( P9 S
the answer is -$97 for sure.
3 B7 H7 w! M( k/ M# M( Ltvb now,tvbnow,bttvbThink about it this way TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。0 C7 `5 t1 L$ u, u& e& s
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
* O: E% H. v; `& v: N. T5 qTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... 1 x1 C$ G3 {7 Z* Y& G) S5.39.217.76' Z, { r( L2 j' |! B6 |+ r
& w; t0 I! [# UTVBNOW 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 wrong
+ f r* [: t, e5 j. d+ c tvb now,tvbnow,bttvb2 x7 u- A" j" e9 U E: I7 \
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.tvb now,tvbnow,bttvb. d. |0 c$ C; y# r0 N- ~2 k0 ~
4 ?3 Y% p0 p* ^ a& hI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |