Find all School-related info fast with the new School-Specific MBA Forum

It is currently 16 Apr 2014, 08:26

Hurry Up:

Last day of registration for Dealing with a Ding - Webinar by GMATClub and Admissionado Consulting.


Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

M02#20, Error or my confusion? Please need help.

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
Joined: 05 Jul 2009
Posts: 186
Followers: 1

Kudos [?]: 12 [0], given: 5

M02#20, Error or my confusion? Please need help. [#permalink] New post 26 Oct 2009, 23:33
If q is a positive integer, is p\frac{q}{\sqrt{q}} an integer?

1. q = p^2
2. p is a positive integer


The Explanation is given as follow:

Statement (1) by itself is sufficient. We know that p = \sqrt{q} . Thus \sqrt{q}\frac{q}{\sqrt{q}} = q . Since q is a positive integer, we have enough information to answer the question.

Statement (2) by itself is insufficient. If p is a positive integer, then p\sqrt{q} may or may not be an integer, depending on q .
The correct answer is A.


Now my question is, how can we say from q = p^2 that p = \sqrt{q}?

Say if P=-2 and q=4 (thus q = p^2). However, -2# \sqrt{4}. So we need to know whether p is positive or negative. So the answer should be C.

Am I making any mistake? Please help.
Intern
Intern
Joined: 06 Jul 2009
Posts: 2
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: M02#20, Error or my confusion? Please need help. [#permalink] New post 27 Oct 2009, 01:31
The explanation seems correct if you notice the question asks whether the term is an integer (NOT necessarily a positive integer), hence the explanation seems correct. the only issues is that the step last value should be +/- q and not just q, which is still an integer.
Hope this helps... :)
Manager
Manager
Joined: 05 Jul 2009
Posts: 186
Followers: 1

Kudos [?]: 12 [0], given: 5

Re: M02#20, Error or my confusion? Please need help. [#permalink] New post 27 Oct 2009, 01:46
mehulsingh wrote:
The explanation seems correct if you notice the question asks whether the term is an integer (NOT necessarily a positive integer), hence the explanation seems correct. the only issues is that the step last value should be +/- q and not just q, which is still an integer.
Hope this helps... :)


Ohh..thanks very much. I was such a careless $%$&^%!!!
Re: M02#20, Error or my confusion? Please need help.   [#permalink] 27 Oct 2009, 01:46
    Similar topics Author Replies Last post
Similar
Topics:
New posts Experts publish their posts in the topic Error in application -- need help pavrnd 1 30 Jan 2006, 10:13
Popular new posts 3 So confusing...need help fatihaysu 16 21 May 2010, 08:37
This topic is locked, you cannot edit posts or make further replies. New Need help with error log. papillon86 1 29 May 2010, 12:39
New posts Confused ..Confused..Confused...Help Needed..... bkparmar 2 27 Sep 2012, 07:21
New posts 1 Confused about my financial condition..please help... akothari91 2 27 Apr 2013, 09:27
Display posts from previous: Sort by

M02#20, Error or my confusion? Please need help.

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, WoundedTiger



GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.