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

It is currently 16 Jan 2019, 21:57

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.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • The winning strategy for a high GRE score

     January 17, 2019

     January 17, 2019

     08:00 AM PST

     09:00 AM PST

    Learn the winning strategy for a high GRE score — what do people who reach a high score do differently? We're going to share insights, tips and strategies from data we've collected from over 50,000 students who used examPAL.
  • Free GMAT Strategy Webinar

     January 19, 2019

     January 19, 2019

     07:00 AM PST

     09:00 AM PST

    Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

Is a positive integer x an odd number? 1) The smallest prime factor of

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Math Revolution GMAT Instructor
User avatar
V
Joined: 16 Aug 2015
Posts: 6806
GMAT 1: 760 Q51 V42
GPA: 3.82
Premium Member
Is a positive integer x an odd number? 1) The smallest prime factor of  [#permalink]

Show Tags

New post 18 Aug 2017, 00:53
1
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

75% (00:42) correct 25% (00:51) wrong based on 97 sessions

HideShow timer Statistics

Is a positive integer x an odd number?

1) The smallest prime factor of x is 7.
2) The greatest prime factor of x is 7.

_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"

Senior Manager
Senior Manager
User avatar
G
Joined: 06 Jul 2016
Posts: 367
Location: Singapore
Concentration: Strategy, Finance
GMAT ToolKit User Premium Member
Re: Is a positive integer x an odd number? 1) The smallest prime factor of  [#permalink]

Show Tags

New post 18 Aug 2017, 01:05
1
2
MathRevolution wrote:
Is a positive integer x an odd number?

1) The smallest prime factor of x is 7.
2) The greatest prime factor of x is 7.


1) Smallest Prime Factor is 7
=> All prime factors greater than 7 would be odd. (2 is the only even prime number)
=> x is odd.
Sufficient.

2) Greatest Prime factor is 7
=> x could have 2,3,5 as prime factors as well -> Not Odd.
=> x could have 3,5,7 as prime factors -> Odd.
Insufficient.

A is the answer.
_________________

Put in the work, and that dream score is yours!

Manager
Manager
User avatar
G
Joined: 27 Dec 2016
Posts: 236
Concentration: Marketing, Social Entrepreneurship
GPA: 3.65
WE: Marketing (Education)
Premium Member Reviews Badge
Re: Is a positive integer x an odd number? 1) The smallest prime factor of  [#permalink]

Show Tags

New post 18 Aug 2017, 03:44
MathRevolution wrote:
Is a positive integer x an odd number?

1) The smallest prime factor of x is 7.
2) The greatest prime factor of x is 7.


Statement 1 :
- X have factor of 7 X ... X ... X ....
- Since X doesn't have the 2 factor, thus the number cannot be EVEN (all of the prime numbers greater than 7 are ODD)
- X must be ODD
Sufficient.

Statement 2 :
- X can have a factor of : 3 X 5 X 7 : ODD
- X can have a factor of : 2 X 7 : EVEN.
INSUFFICIENT.

So the answer is B.
_________________

There's an app for that - Steve Jobs.

Math Revolution GMAT Instructor
User avatar
V
Joined: 16 Aug 2015
Posts: 6806
GMAT 1: 760 Q51 V42
GPA: 3.82
Premium Member
Re: Is a positive integer x an odd number? 1) The smallest prime factor of  [#permalink]

Show Tags

New post 20 Aug 2017, 18:09
=>Condition 1)
2 cannot be a factor of x, since the smallest prime factor of x is 7.

Condition 2)
Consider n = 2 and n =3.


Ans: A
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"

Intern
Intern
avatar
B
Joined: 19 Sep 2016
Posts: 35
Re: Is a positive integer x an odd number? 1) The smallest prime factor of  [#permalink]

Show Tags

New post 02 Sep 2017, 10:01
Answer is A. Statement 1 is sufficient to answer that the prime factorization would have 7 and above prime numbers hence it is an odd number

Sent from my SM-N920G using GMAT Club Forum mobile app
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 9424
Premium Member
Re: Is a positive integer x an odd number? 1) The smallest prime factor of  [#permalink]

Show Tags

New post 17 Dec 2018, 10:04
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

GMAT Club Bot
Re: Is a positive integer x an odd number? 1) The smallest prime factor of &nbs [#permalink] 17 Dec 2018, 10:04
Display posts from previous: Sort by

Is a positive integer x an odd number? 1) The smallest prime factor of

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


Copyright

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®.