原帖由 prozzy 於 2007-5-18 23:05 發表。 
/ R5 m( o& O" t6 M. L公仔箱論壇the answer is -$97 for sure.
2 ~. G/ j Y- |' g8 h5 }公仔箱論壇Think about it this way 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。2 |* t% e: X* B A
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
" l$ q. M: L9 j: K$ `# h$ V5 x公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... ! }0 U) @0 p6 S; V* F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。) c0 ]2 x! ^- q" { h
公仔箱論壇- h( ]+ _/ X* y" r; g' S/ R
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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/ d3 O4 ?& p& v, [, R2 C公仔箱論壇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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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |