原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇. Q* [* r3 u9 q+ U8 V
the answer is -$97 for sure.
1 P0 ` b6 e0 OTVBNOW 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8 z: M% v# }# `
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)9 i) k2 B) q- f8 ]8 c( s& L
2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb+ A H5 ^8 R j8 M
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。! \, f. @9 Q# ^3 e2 p; b
1 D7 d& _' A/ A0 R1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb b( N% `+ z- I. F
1 Y; ?* ^; e) d0 T* j) j) ~( CTVBNOW 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 $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
3 h: b* W8 e' O! s# Ctvb now,tvbnow,bttvb TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。) E5 M/ h* \+ E6 m, Z2 J0 j$ s
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |