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Johnny Dangerously's pet store


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#1 bonanova

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Posted 21 May 2012 - 09:34 PM

Johnny Dangerously spotted a sale on small pets for his store that he couldn't resist. Giddy with visions of profit, he bought a certain number of hamsters and half that many pairs of parakeets. He paid $2 each for the hamsters and $1 for each parakeet. On every pet he [carefully] stuck a retail price that was a 10 per cent mark-up over what he paid for it.

After all but seven of the creatures had been sold, Johnny found that he had taken in for them an amount of money exactly equal to what he had originally paid for all of them. Wow. How cool was that. His potential profit was represented by the combined retail value of the seven remaining animals. What was this value?
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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#2 Rob_G

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Posted 21 May 2012 - 10:25 PM

Spoiler for His profit will be

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#3 plasmid

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Posted 22 May 2012 - 12:53 AM

I got a different answer. But just to be sure about one important point
Spoiler for

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#4 superprismatic

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Posted 22 May 2012 - 01:10 AM

Spoiler for So as to avoid splitting a pair of parakeets

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#5 bonanova

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Posted 22 May 2012 - 02:45 AM

Spoiler for His profit will be

Nope, sorry.


I got a different answer. But just to be sure about one important point

Spoiler for

You noted a necessary part of the puzzle. Did you get SP?'s answer below?


Spoiler for So as to avoid splitting a pair of parakeets

Bingo. bona_gold_star.gif
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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell




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