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If n is a positive integer and p = 3.021 10n, what is the [#permalink]
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24 Apr 2011, 09:22
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30% (02:15) correct
70% (00:41) wrong based on 13 sessions
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If n is a positive integer and p = 3.021 × 10n, what is the value of n?
1. 3,021 < p < 302,100 2. 103 < p < 105
If n is a positive integer and \(p = 3.021 * (10)^n\), what is the value of n? 1. \(3,021 < p < 302,100\) 2. \((10)^3 < p < (10)^5\)
Last edited by fluke on 28 Apr 2011, 03:18, edited 2 times in total.
Modifying the question to be correct



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Re: Data sufficiency  Inequalities and basic equation [#permalink]
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26 Apr 2011, 12:32
If n is a positive integer and p = 3.021 × 10n, what is the value of n?
1. 3,021 < p < 302,100 2. 103 < p < 105
Are you asking for how to solve this? Here is how I would approach it
Look at it as p = 30.21*n
1. I would immediately see that setting n =100 would make p = 3021, so n>1000. Setting n = 10000 sets p = 302100.
Thus 100 > n > 10000 NOT SUFFICIENT
2. If we had n = 3 it would be ~90 , if we had n = 4 it would be ~120. Every other n would not work.
NOT SUFFICIENT
IMPORTANT:
This is not a valid DS question for the GMAT. The two options will never contradict each other. Option 2 clearly contradicts option 1. Option 1 allows for a giant range of values while option 2 implies there is no answer at all



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Re: Data sufficiency  Inequalities and basic equation [#permalink]
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26 Apr 2011, 13:58
This isn't a GMAT question for sure!! agdimple333 wrote: If n is a positive integer and p = 3.021 × 10n, what is the value of n?
1. 3,021 < p < 302,100 2. 103 < p < 105
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Re: Data sufficiency  Inequalities and basic equation [#permalink]
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27 Apr 2011, 13:54
agdimple333 wrote: If n is a positive integer and p = 3.021 × 10n, what is the value of n?
1. 3,021 < p < 302,100 2. 103 < p < 105 agdimple333: Is the actual question as follows? If n is a positive integer and \(p = 3.021 * (10)^n\), what is the value of n? 1. \(3,021 < p < 302,100\) 2. \((10)^3 < p < (10)^5\)
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Re: Data sufficiency  Inequalities and basic equation [#permalink]
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27 Apr 2011, 15:05
i think you are right. And now i think that i didnt get the answer because it was printed incorrect on pdf file tht i was reading.



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Re: Data sufficiency  Inequalities and basic equation [#permalink]
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28 Apr 2011, 01:29
fluke wrote: agdimple333 wrote: If n is a positive integer and p = 3.021 × 10n, what is the value of n?
1. 3,021 < p < 302,100 2. 103 < p < 105 agdimple333: Is the actual question as follows? If n is a positive integer and \(p = 3.021 * (10)^n\), what is the value of n? 1. \(3,021 < p < 302,100\) 2. \((10)^3 < p < (10)^5\) combining options 1 and 2, n can be either 3 or 4. hence E.
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Re: Data sufficiency  Inequalities and basic equation [#permalink]
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28 Apr 2011, 03:04
If n is a positive integer and \(p = 3.021 * (10)^n\), what is the value of n? 1. \(3,021 < p < 302,100\) 2. \((10)^3 < p < (10)^5\) 1. \(3021=3.021*10^3\) \(302100=3.021*10^5\) \(3.021*10^3 < p < 3.021*10^5\) \(3.021*10^3 < 3.021*10^4 < 3.021*10^5\) n=4 Sufficient. 2. \((10)^3 < p < (10)^5\) \(1000 < p < 100000\) p can be 3021 or 30210 making n=3 or n=4 respectively. Not Sufficient. Ans: "A"
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