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# HOW TO SOLVE THIS?

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Current Student
Joined: 11 May 2008
Posts: 551

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29 Aug 2008, 10:24
could not quite understand....

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VP
Joined: 21 Jul 2006
Posts: 1455
Re: HOW TO SOLVE THIS? [#permalink]

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29 Aug 2008, 10:32
Reciprocal means a number that you multiple with a given number so that the product will be 1. For example, the reciprocal of 2 is 1/2, and the reciprocal of 1/5 is 5, and the reciprocal of -1/5 is -5.

since the square of n is less than 1/100, we know that in order to get even a smaller fraction, the denominator must increase. The number that this question talks about is -1/10 and if you square it, then you will get 1/100. so the denominator in -1/10, which is 10 must increase. The reciprocal of -1/10 is -10. So N must be less than -10, therefore A is our answer.
SVP
Joined: 07 Nov 2007
Posts: 1738
Location: New York
Re: HOW TO SOLVE THIS? [#permalink]

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29 Aug 2008, 10:38
arjtryarjtry wrote:
could not quite understand....

n^2<1/100

n<-1/10

1/n < -10
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Current Student
Joined: 11 May 2008
Posts: 551
Re: HOW TO SOLVE THIS? [#permalink]

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29 Aug 2008, 10:46
but i thought that x^2>4 -> x>2 or x<-2... does that logic not apply here?
SVP
Joined: 07 Nov 2007
Posts: 1738
Location: New York
Re: HOW TO SOLVE THIS? [#permalink]

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29 Aug 2008, 10:53
arjtryarjtry wrote:
but i thought that x^2>4 -> x>2 or x<-2... does that logic not apply here?

yeap same logic applies here.

n^2<1/100

say 1/n =x

x^2 >100

x >10 or x<-10

_________________

Smiling wins more friends than frowning

Current Student
Joined: 11 May 2008
Posts: 551
Re: HOW TO SOLVE THIS? [#permalink]

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29 Aug 2008, 10:59
:bouncer :good suresh

:beat ... i deserve ... i could not remember such a simple thing....

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: HOW TO SOLVE THIS?   [#permalink] 29 Aug 2008, 10:59
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# HOW TO SOLVE THIS?

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