GMAT Question of the Day - Daily to your Mailbox; hard ones only
close

It is currently 21 Aug 2018, 16:52
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
Unanswered

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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel

If x and y are positive integers, is x a factor of 12?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
  Sort by Date Sort by Kudos  
Search for:
 
Print view
First unread post
Author Message
TAGS:

Hide Tags
Manager
Manager
avatar
Joined: 06 Jun 2012
Posts: 135
GMAT ToolKit User
If x and y are positive integers, is x a factor of 12?  [#permalink]

Show Tags

New post 26 Jul 2013, 02:38
1
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

62% (00:48) correct 38% (00:44) wrong based on 239 sessions

HideShow timer Statistics

If x and y are positive integers, is x a factor of 12?

(1) The product of xy is a factor of 12
(2) y =3
Spoiler: OA

_________________

Please give Kudos if you like the post

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 48110
Premium Member CAT Tests
Top Member of the Month
Re: If x and y are positive integers, is x a factor of 12?  [#permalink]

Show Tags

New post 26 Jul 2013, 02:59
2
1
If x and y are positive integers, is x a factor of 12?

The question asks whether 12/x=integer.

(1) The product of xy is a factor of 12 --> 12/(xy)=integer --> 12/x=y*integer=integer. Sufficient.

(2) y =3. Clearly insufficient.

Answer: A.

P.S. Please do not reword or shorten the questions. Thank you.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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. ,11 Mixed Questions, 12 Fresh Meat

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., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Intern
Intern
avatar
Joined: 09 Jan 2013
Posts: 7
Location: United States
Concentration: Finance
Schools: YLP '15
GMAT ToolKit User
Re: If x and y are positive integers, is x a factor of 12?  [#permalink]

Show Tags

New post 28 Jul 2013, 01:01
Hi bunuel

What if x=18 and y=3 then xy is a factor of 12 but x is not a factor of 12.

Can u pl help me
Intern
Intern
avatar
Joined: 16 Jul 2012
Posts: 1
Re: If x and y are positive integers, is x a factor of 12?  [#permalink]

Show Tags

New post 28 Jul 2013, 04:33
sravanigayatri wrote:
Hi bunuel

What if x=18 and y=3 then xy is a factor of 12 but x is not a factor of 12.

Can u pl help me


In the above case XY is a multiple of 12 not a factor. A factor means a divisor which doesn't leave remainder. So factors of 12 are 1,2,3,4,6 and 12
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 48110
Premium Member CAT Tests
Top Member of the Month
Re: If x and y are positive integers, is x a factor of 12?  [#permalink]

Show Tags

New post 28 Jul 2013, 04:34
sravanigayatri wrote:
Hi bunuel

What if x=18 and y=3 then xy is a factor of 12 but x is not a factor of 12.

Can u pl help me


If x=18 and y=3, then xy=54. 54 is NOT a factor of 12.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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. ,11 Mixed Questions, 12 Fresh Meat

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., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 48110
Premium Member CAT Tests
Top Member of the Month
Re: If x and y are positive integers, is x a factor of 12?  [#permalink]

Show Tags

New post 28 Jul 2013, 04:35
vvraman wrote:
sravanigayatri wrote:
Hi bunuel

What if x=18 and y=3 then xy is a factor of 12 but x is not a factor of 12.

Can u pl help me


In the above case XY is a multiple of 12 not a factor. A factor means a divisor which doesn't leave remainder. So factors of 12 are 1,2,3,4,6 and 12


xy=54 is not a multiple of 12 either.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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. ,11 Mixed Questions, 12 Fresh Meat

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., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 7779
Premium Member
Re: If x and y are positive integers, is x a factor of 12?  [#permalink]

Show Tags

New post 08 Nov 2017, 02:14
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Re: If x and y are positive integers, is x a factor of 12? &nbs [#permalink] 08 Nov 2017, 02:14
Print view
First unread post
Display posts from previous: Sort by

If x and y are positive integers, is x a factor of 12?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, VeritasKarishma, Bunuel, mikemcgarry, gmatbusters, amanvermagmat

Search for:

Events & Promotions

PREV
NEXT


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions