原帖由 prozzy 於 2007-5-18 23:05 發表。 5.39.217.77:8898, t6 t& m* t D4 R0 l: P
the answer is -$97 for sure.
8 h9 p! Z1 r' WTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。Think about it this way 公仔箱論壇- \" N- E2 h( J$ h! i
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
! X; G9 }6 o- ^ Z! q& Ltvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... , v# C! E1 t" I9 M7 e- V/ m4 O' c+ f Z7 K0 ?3 g. I3 C" w
7 x- `/ x( I. q0 Y8 `) |" m
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
" N- t# P0 a. n
/ {( X% M; i3 z: m; Z# T) a3 Ntvb 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.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 J8 F! x/ \9 L4 Y& E
3 y" l) W4 D8 i% i7 Z8 w" f2 Q# l5.39.217.77:8898I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |