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

It is currently 20 Aug 2014, 22:33

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

Is x the square of an integer? (1) x = 12k + 6, where k is a

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
GMAT Instructor
User avatar
Joined: 07 Jul 2003
Posts: 771
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Followers: 9

Kudos [?]: 26 [0], given: 0

GMAT Tests User
Is x the square of an integer? (1) x = 12k + 6, where k is a [#permalink] New post 14 Jul 2003, 09:42
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

50% (00:00) correct 50% (01:39) wrong based on 4 sessions
Is x the square of an integer?

(1) x = 12k + 6, where k is a positive integer

(2) x = 3q + 9, where q is a positive integer

(A) Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
(B) Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
(C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
(D) Each statement ALONE is sufficient.
(E) Statements (1) and (2) TOGETHER are NOT sufficient.
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

Intern
Intern
avatar
Joined: 31 May 2003
Posts: 21
Followers: 0

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

I vote for A. [#permalink] New post 14 Jul 2003, 11:43
if you do the factoring thingy you get:

1). x= 6(2k+1), since k is interger, then 2k+1 must be odd, then it is not possible to provide another 6, so A is sufficient to tell that x is not a perfect squre.

2) is not sufficient. since: x=3(q+3), if q equals to 9 and other numbers that provide a sum with 3 as an facter and another perfect square as another, then x is perfect squre, otherwise no.
GMAT Instructor
User avatar
Joined: 07 Jul 2003
Posts: 771
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Followers: 9

Kudos [?]: 26 [0], given: 0

GMAT Tests User
Re: I vote for A. [#permalink] New post 15 Jul 2003, 00:27
minghoo wrote:
if you do the factoring thingy you get:

1). x= 6(2k+1), since k is interger, then 2k+1 must be odd, then it is not possible to provide another 6, so A is sufficient to tell that x is not a perfect squre.

2) is not sufficient. since: x=3(q+3), if q equals to 9 and other numbers that provide a sum with 3 as an facter and another perfect square as another, then x is perfect squre, otherwise no.


Both the answer and method are correct. Good job.
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

1 KUDOS received
SVP
SVP
avatar
Joined: 16 Nov 2010
Posts: 1692
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 30

Kudos [?]: 285 [1] , given: 36

GMAT Tests User Premium Member Reviews Badge
Re: DS problem. [#permalink] New post 20 Mar 2011, 02:24
1
This post received
KUDOS
From (1)

x = 12K + 6

=> x = 6(2k+1) = 2 * 3 * (an odd number)

So it can't be the case because and odd number will not have 2 as a factor which is needed to factor in the 2.


From(2)

x = 3q+9

=> x = 3(q+3)

Here, the number my or may not be a square.

For example, x = 3 * (1+3) - not a square

x = 3 * (24+3) = 3*27 = 9*9 - a square

So answer is A.
_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Manager
Manager
avatar
Joined: 05 Jan 2011
Posts: 178
Followers: 3

Kudos [?]: 19 [0], given: 8

GMAT Tests User
Re: DS problem. [#permalink] New post 20 Mar 2011, 06:45
subhashghosh wrote:
From (1)

x = 12K + 6

=> x = 6(2k+1) = 2 * 3 * (an odd number)

So it can't be the case because and odd number will not have 2 as a factor which is needed to factor in the 2.


From(2)

x = 3q+9

=> x = 3(q+3)

Here, the number my or may not be a square.

For example, x = 3 * (1+3) - not a square

x = 3 * (24+3) = 3*27 = 9*9 - a square

So answer is A.


Good one. Kudos to u
Re: DS problem.   [#permalink] 20 Mar 2011, 06:45
    Similar topics Author Replies Last post
Similar
Topics:
If x and k are integers and 12^x*4^(2x+1)=2^k*3^2, what is Jasonammex 5 23 Aug 2011, 17:09
3 Experts publish their posts in the topic If x is an integer, is (x squared +1)(x+5) an even number? 1 mybudgie 4 04 Nov 2010, 17:37
13 Experts publish their posts in the topic If k and x are positive integers and x is divisible by 6 Burnkeal 14 29 Oct 2010, 16:10
2 Is the positive square root of x an integer? 1. x=n^6 and n TheSituation 1 30 Jul 2010, 09:46
Is the positive integer x odd? (1) x = y2 + 4y + 6, where y koSTARica 2 01 Aug 2006, 01:54
Display posts from previous: Sort by

Is x the square of an integer? (1) x = 12k + 6, where k is a

  Question banks Downloads My Bookmarks Reviews Important topics  


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®.