原帖由 prozzy 於 2007-5-18 23:05 發表。 * a: l }/ o5 J/ O0 A
the answer is -$97 for sure. " r, G" V( m2 d$ ~( `) L9 ~
Think about it this way
! i/ D0 A+ \: k3 Y& S8 Z2 c2 ]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) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
: _: C& q( H5 F$ X1 MTVBNOW 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 ... ) }$ r# Y9 [8 ]tvb now,tvbnow,bttvb公仔箱論壇4 q& ? o' R+ a( P a, f4 O
! r% K2 \- M: s* r ^5.39.217.761) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
, n+ P4 m- c$ ?3 V( m$ 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。 tvb now,tvbnow,bttvb1 v3 t3 \$ Y7 c' b0 z, q8 `
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.
}! U8 w% K. T4 e8 \6 | H公仔箱論壇 5.39.217.766 f5 P! g( H% ^3 X9 N
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |