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

It is currently 23 Sep 2018, 15:27

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

Is the value of 3^a/3^b a prime number?

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49320
Is the value of 3^a/3^b a prime number?  [#permalink]

Show Tags

New post 05 Sep 2017, 04:48
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

59% (00:41) correct 41% (01:04) wrong based on 66 sessions

HideShow timer Statistics

Director
Director
User avatar
P
Joined: 18 Aug 2016
Posts: 629
Concentration: Strategy, Technology
GMAT 1: 630 Q47 V29
GMAT 2: 740 Q51 V38
GMAT ToolKit User Premium Member Reviews Badge
Re: Is the value of 3^a/3^b a prime number?  [#permalink]

Show Tags

New post 05 Sep 2017, 04:56
1
Bunuel wrote:
Is the value of 3^a/3^b a prime number?

(1) a + b = 8
(2) a – b = 2


3^a/3^b can be written as 3^(a-b)

(1) not sufficient to get the value of a-b..suppose (a,b) as (5,3) then not prime but if (4.5, 3.5) then prime...not sufficient

(2) a-b = 2
3^2 = 9 not prime
Sufficient

B
_________________

We must try to achieve the best within us


Thanks
Luckisnoexcuse

GMAT Club Bot
Re: Is the value of 3^a/3^b a prime number? &nbs [#permalink] 05 Sep 2017, 04:56
Display posts from previous: Sort by

Is the value of 3^a/3^b a prime number?

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

Events & Promotions

PREV
NEXT


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®.