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

It is currently 16 Sep 2014, 20:01

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 a product of three integers XYZ a prime? (1) X= Y (2) Z=1

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
SVP
SVP
User avatar
Joined: 05 Jul 2006
Posts: 1542
Followers: 5

Kudos [?]: 76 [0], given: 39

Is a product of three integers XYZ a prime? (1) X= Y (2) Z=1 [#permalink] New post 05 Sep 2006, 08:33
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Is a product of three integers XYZ a prime?

(1) X=–Y
(2) Z=1
Manager
Manager
User avatar
Joined: 25 May 2006
Posts: 227
Followers: 1

Kudos [?]: 14 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Sep 2006, 08:50
C

St1: Insuff
St2: Insuff

St1 and St2: Suff

If I'm correct there are no negative prime numbers.
_________________

Who is John Galt?

Current Student
User avatar
Joined: 29 Jan 2005
Posts: 5252
Followers: 23

Kudos [?]: 131 [0], given: 0

GMAT Tests User Reviews Badge
Re: Prime numbers properties DS [#permalink] New post 05 Sep 2006, 08:50
yezz wrote:
Is a product of three integers XYZ a prime?

(1) X=–Y
(2) Z=1


Statement 1: Two different integers, doesn`t matter what z is. Invalidates the definition of prime SUFF

Statement 2: No info about X or Y. INSUFF

(A)
Current Student
User avatar
Joined: 29 Jan 2005
Posts: 5252
Followers: 23

Kudos [?]: 131 [0], given: 0

GMAT Tests User Reviews Badge
 [#permalink] New post 05 Sep 2006, 08:56
X & Y wrote:
C

St1: Insuff
St2: Insuff

St1 and St2: Suff

If I'm correct there are no negative prime numbers.

I can't confirm the source, but apparently -ive prime numbers do exist:

http://www.mazes.com/primes/negative.html
SVP
SVP
User avatar
Joined: 05 Jul 2006
Posts: 1542
Followers: 5

Kudos [?]: 76 [0], given: 39

 [#permalink] New post 05 Sep 2006, 09:00
there is no -ve prime numbers

because then they will have three divisors ( themselfes - 1 and -ve one) thus violates the difinition of a prime numbers

:wink:
Manager
Manager
User avatar
Joined: 25 May 2006
Posts: 227
Followers: 1

Kudos [?]: 14 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Sep 2006, 09:03
Correct, it's all about patterns.
_________________

Who is John Galt?

Current Student
avatar
Joined: 28 Dec 2004
Posts: 3405
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 159 [0], given: 2

GMAT Tests User
 [#permalink] New post 05 Sep 2006, 09:09
I say this is C...

the question stem doesnt say if the XYZ are distinct...

OK, lets see...

(1) x=-y
say y=-1, thenx=1, z=-3, product x*y*z=3..which is a prime..

it can also be ...y=1, x=-1, z=1, -1 is not a prime insuff

(2) z=1...doesnt tell much...insuff

together...we know that product of X*Y*Z is negative, which in GMAT world is never a prime..C it is..
CEO
CEO
User avatar
Joined: 20 Nov 2005
Posts: 2922
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 15

Kudos [?]: 80 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Sep 2006, 09:24
GMATT73 wrote:
X & Y wrote:
C

St1: Insuff
St2: Insuff

St1 and St2: Suff

If I'm correct there are no negative prime numbers.

I can't confirm the source, but apparently -ive prime numbers do exist:

http://www.mazes.com/primes/negative.html


yes they do exist but for GMAT purpose you can assume that there are no -ve prime numbers.
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Current Student
User avatar
Joined: 29 Jan 2005
Posts: 5252
Followers: 23

Kudos [?]: 131 [0], given: 0

GMAT Tests User Reviews Badge
 [#permalink] New post 05 Sep 2006, 09:31
ps_dahiya wrote:
GMATT73 wrote:
X & Y wrote:
C

St1: Insuff
St2: Insuff

St1 and St2: Suff

If I'm correct there are no negative prime numbers.

I can't confirm the source, but apparently -ive prime numbers do exist:

http://www.mazes.com/primes/negative.html


yes they do exist but for GMAT purpose you can assume that there are no -ve prime numbers.

HARDWIRED
SVP
SVP
User avatar
Joined: 05 Jul 2006
Posts: 1542
Followers: 5

Kudos [?]: 76 [0], given: 39

 [#permalink] New post 05 Sep 2006, 09:50
GMATT73... GO MAN GO YOU ARE THE ONE (KILL M ALL) :m16

:lol:
  [#permalink] 05 Sep 2006, 09:50
    Similar topics Author Replies Last post
Similar
Topics:
Is a product of three integers XYZ a prime? (1) X=-Y (2) Z=1 yezz 2 10 Aug 2009, 09:59
Is |x|=y-z? (1) x+y=z (2) x<0 marshpa 7 28 Aug 2008, 12:07
is |x|=y-z ? 1. x+y=z 2. x<0 first we know that y-z=|x|, Nsentra 6 07 Oct 2006, 18:23
The three integers X, Y, and Z. Is their product XYZ = zero yezz 28 11 Sep 2006, 09:17
Is absolute value x equal to y minus z? 1) x+y=z 2) x<0 jlui4477 11 20 Apr 2006, 15:55
Display posts from previous: Sort by

Is a product of three integers XYZ a prime? (1) X= Y (2) Z=1

  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®.