原帖由 prozzy 於 2007-5-18 23:05 發表。 # x4 U3 i y, Y: F$ J
the answer is -$97 for sure.
' _( ~7 _+ s) _0 ]& HThink about it this way
; C+ E; C! T$ g P$ `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)
( N' u; J! w* O2 s9 T5 t公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb9 e# v0 D4 X7 Q! `7 k
- {4 ^: P/ s0 D& ?+ `tvb now,tvbnow,bttvb
* f7 w5 o! V2 B1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
( b# H1 p E. k) D( L2 k$ H公仔箱論壇 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。6 f# g7 H" Y( H/ C- Q$ x2 r
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |