原帖由 prozzy 於 2007-5-18 23:05 發表。  # f! l, U+ b& `- w
the answer is -$97 for sure.
3 K& s# p' |6 d0 ^) e: d公仔箱論壇Think about it this way 公仔箱論壇4 ]0 T! r- L$ {( ~8 C
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
; a0 ^1 g3 b$ z$ @+ G2 r2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.762 e( b" C' Y3 Q
5.39.217.76: ~( T' {- V$ {- B' i+ U5 o
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. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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