原帖由 prozzy 於 2007-5-18 23:05 發表。 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。- y" | a+ H( h |; S* r7 S
the answer is -$97 for sure.
% m5 S3 s3 L- s! v0 O% p, Hos.tvboxnow.comThink about it this way
; D) k- M: t6 R: H9 H1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)os.tvboxnow.com# |+ N V3 C! w9 W- {- g. a
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ( c u/ _& d1 g6 H! `% o, ~$ ^tvb now,tvbnow,bttvbTVBNOW 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。. f3 U- i& b9 U, t
公仔箱論壇+ f; a' ^, T7 a7 A! Z
1) 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.
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# l; T) l' l: N- A6 U. ~os.tvboxnow.comI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |