原帖由 prozzy 於 2007-5-18 23:05 發表。 
0 a7 |* s! B) {) m* P3 i; Ctvb now,tvbnow,bttvbthe answer is -$97 for sure. 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。) V- {! M3 H2 b- v% s& v
Think about it this way
5 O, i! h; s% u; G5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
0 j; y# `% i% B _, PTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。0 i2 I h# t q8 B$ S8 x
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. `* S0 t% B
tvb now,tvbnow,bttvb, r2 v. I* l+ ^+ c( G
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
2 S0 r* N0 R3 h0 r公仔箱論壇 . W, Z0 N4 C7 _) e. t1 N( z
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.
) i% O5 d6 Q5 \4 \8 {( b' I5.39.217.76
! ?8 e& G( m+ {( { v3 mI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |