原帖由 prozzy 於 2007-5-18 23:05 發表。 5.39.217.767 ?& C% m, o, ?+ _- }' T j2 u
the answer is -$97 for sure. $ V+ M! L9 P% A/ L+ Q! Z. k! X
Think about it this way 8 P2 p) \6 g( M/ Q! u) G/ `
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1 |+ s' E/ b+ @$ t& x
2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb% m* n% `/ e* @( T
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$ I# ~* `( d( H+ L- q5.39.217.761) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
2 \% R# ~) I* o" d( y3 y' t$ K3 x公仔箱論壇
4 n7 p2 ] I# E6 \ Ethink 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. |