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

It is currently 02 Jul 2016, 00:57
GMAT Club Tests

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

Does p^2=q if p is a prime number? 1. q^2-p^2=0 2. p^2=49

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Senior Manager
Senior Manager
avatar
Joined: 29 Jun 2005
Posts: 403
Followers: 2

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

Does p^2=q if p is a prime number? 1. q^2-p^2=0 2. p^2=49 [#permalink]

Show Tags

New post 24 Jul 2005, 07:04
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Does p^2=q if p is a prime number?
1. q^2-p^2=0
2. p^2=49
Senior Manager
Senior Manager
avatar
Joined: 17 Apr 2005
Posts: 375
Location: India
Followers: 1

Kudos [?]: 23 [0], given: 0

Re: DS - prime number [#permalink]

Show Tags

New post 25 Jul 2005, 11:38
Dilshod wrote:
Does p^2=q if p is a prime number?
1. q^2-p^2=0
2. p^2=49


Picked A.

Using (1) p^2 = q^2.
we know that q^2 = q only when q = 0 or 1.
Since q is the sqaure of a prime number q cannot be either.
Hence p^2 != q.

HMTG.
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3385
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 14

Kudos [?]: 241 [0], given: 2

 [#permalink]

Show Tags

New post 25 Jul 2005, 11:46
A

the number is is either 0 or 1....

which is not a prime number....
Senior Manager
Senior Manager
avatar
Joined: 04 May 2005
Posts: 282
Location: CA, USA
Followers: 1

Kudos [?]: 39 [0], given: 0

 [#permalink]

Show Tags

New post 26 Jul 2005, 08:31
A

P^2-q^2=0 and p is prime (=> p != 1)
therefore p^2 != q
Director
Director
avatar
Joined: 05 Jan 2005
Posts: 560
Followers: 2

Kudos [?]: 20 [0], given: 0

Re: DS - prime number [#permalink]

Show Tags

New post 26 Jul 2005, 12:52
Dilshod wrote:
Does p^2=q if p is a prime number?
1. q^2-p^2=0
2. p^2=49


I'm getting (E) on this.

From Statement 1:
q^2-p^2 can be written as (p-q)(p+q) = 0
which means that p-q=0 or p+q=0
meaning that p=q or p=-q

From Statement 2:
p may be 7 or -7 (we don't know q but p is a prime no)

Combine: does not work.
Senior Manager
Senior Manager
avatar
Joined: 04 May 2005
Posts: 282
Location: CA, USA
Followers: 1

Kudos [?]: 39 [0], given: 0

 [#permalink]

Show Tags

New post 26 Jul 2005, 13:25
The question is asking:

Does p^2=q ?

not whether p = q ?
Director
Director
avatar
Joined: 05 Jan 2005
Posts: 560
Followers: 2

Kudos [?]: 20 [0], given: 0

 [#permalink]

Show Tags

New post 26 Jul 2005, 23:52
qpoo wrote:
The question is asking:

Does p^2=q ?

not whether p = q ?


Oh now i see. And it says P is a prime no, so P cannot be 1. It's (A) then. Definite 'No' answer. thanks.
  [#permalink] 26 Jul 2005, 23:52
Display posts from previous: Sort by

Does p^2=q if p is a prime number? 1. q^2-p^2=0 2. p^2=49

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| 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®.