原帖由 prozzy 於 2007-5-18 23:05 發表。 , P- I. z8 ]$ f/ s/ ^5 |8 `
the answer is -$97 for sure.
$ c ]" L) F+ W( D% C, |2 c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。9 \, N" E! ]) j: j
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)www2.tvboxnow.com) v7 R' d( }' `+ h" l1 R+ m
2) Now, the owner discovered that the 100 bucks is fake. You can th ... % s- T& F) Q7 ~$ _! }- h: }) D7 K. Iwww2.tvboxnow.com Q" f& V0 ` U
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。$ G" j" d$ _+ x- j% M7 M
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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; t0 x& _$ y) |$ q& c/ y) s/ I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. |