Is x a prime number?

Oldest

Best Reply

Author

Message

TAGS:

Senior Manager

Joined: 29 Nov 2012

Posts: 277

Followers: 1

Kudos [?]: 12 [0], given: 239

Is x a prime number? [#permalink]

20 Dec 2012, 01:16

00:00

Question Stats:

54% (01:27) correct

45% (00:37) wrong

based on 0 sessions

Is x a prime number?

(1) x is an even number.
(2) x can not be divided evenly by an odd number other than 1.

can someone please explain statement 2

[Reveal] Spoiler: OA

Verbal GMAT Forum Moderator

Status: Preparing for the another shot...!

Joined: 03 Feb 2011

Posts: 1322

Location: India

Concentration: Finance, Marketing

GMAT 1: 720 Q V

GPA: 3.75

Followers: 63

Kudos [?]: 311 [0], given: 52

Re: Is x a prime number? [#permalink]

20 Dec 2012, 01:34

Statement 2 states that x is not evenly divisible by an odd number other than 1.
It talks, IMO, about numbers such as 2, 4, 8, 10 etc i.e. multiples of 2 that are not divisible by ANY odd number but 1.
_________________

Prepositional Phrases Clarified|Elimination of BEING| Absolute Phrases Clarified
Rules For Posting

GMAT Club team member

Joined: 02 Sep 2009

Posts: 11515

Followers: 1791

Kudos [?]: 9536 [1] , given: 826

Re: Is x a prime number? [#permalink]

20 Dec 2012, 02:14

This post received
KUDOS

Marcab wrote:

10 is divisible by 5 so x cannot be 10.

Is x a prime number?

(1) x is an even number. If x=2 then the answer is YES but if x is any other even number then the answer is NO. Not sufficient.

(2) x can not be divided evenly by an odd number other than 1. This statement implies that x is some power of 2: 2, 4, 8, 16, ... Not sufficient.

(1)+(2) Still not sufficient. Consider x=2 and x=4.

Answer: E.
_________________

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!

What are GMAT Club Tests?
25 extra-hard Quant Tests

Find out what's new at GMAT Club - latest features and updates

Verbal GMAT Forum Moderator

Status: Preparing for the another shot...!

Joined: 03 Feb 2011

Posts: 1322

Location: India

Concentration: Finance, Marketing

GMAT 1: 720 Q V

GPA: 3.75

Followers: 63

Kudos [?]: 311 [0], given: 52

Re: Is x a prime number? [#permalink]

20 Dec 2012, 02:20

yeah right.
missed it completely.
_________________

Prepositional Phrases Clarified|Elimination of BEING| Absolute Phrases Clarified
Rules For Posting

Re: Is x a prime number? [#permalink] 20 Dec 2012, 02:20

		Similar topics	Author	Replies	Last post
Similar Topics:		Is X+Y a prime number? 1) X is even prime number 2)	getzgetzu	1	05 May 2006, 23:26
		If x is a prime number, what is the value of x?	above720	3	17 May 2007, 18:07
		If x and y are prime numbers	bjshukla	4	02 Jan 2011, 14:08
	6	Is root{x} a prime number?	LM	17	26 Jan 2012, 06:41
	1	If x is an integer, then is x a prime number?	amp0201	2	04 May 2012, 20:51

Is x a prime number?

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.

GMAT Courses

Admissions Consulting

Is x a prime number?

Is x a prime number?

Main navigation

GMAT Resources

Partners

MBA Resources