原帖由 prozzy 於 2007-5-18 23:05 發表。 5.39.217.76* m' Z$ K% j8 n7 F+ {; K" L
the answer is -$97 for sure. 1 x0 U2 ^ Z2 c/ ^7 ~% y
Think about it this way 公仔箱論壇7 V# y' T8 i( ?1 K, ~4 |+ s
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
5 |1 q7 o9 j0 O2 j# ~TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... ) D3 \8 U. a6 h" X" S
' n5 I% ^) l! L6 Htvb now,tvbnow,bttvb 5.39.217.76' P* u0 r$ b/ v2 b& ^, ]
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
`# p2 l" F# vtvb now,tvbnow,bttvb
: `: X9 {9 L# e2 n1 |公仔箱論壇think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.公仔箱論壇- g) C5 D$ H1 h
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。5 s: G, }/ c! O: j. o* w& ^( c
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |