Last visit was: 10 May 2026, 22:31 It is currently 10 May 2026, 22:31
Home
Messages
Tests
Schools
Events
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
User avatar
puma
User avatar
Joined: 23 Mar 2008
Last visit: 11 Oct 2008
Posts: 153
Own Kudos:
1,622
Posts: 153
Kudos: 1,622
Can teh positive integer n be written as the sum of two 31 Mar 2008, 11:08
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Can teh positive integer n be written as the sum of two different positive prime numbers?

1) n is greater than 3
2) n is odd

many thanks



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
onyxls1
User avatar
Joined: 31 Mar 2008
Last visit: 11 Apr 2009
Posts: 6
Own Kudos:
3
Posts: 6
Kudos: 3
Can teh positive integer n be written as the sum of two 31 Mar 2008, 11:14
Kudos
Add Kudos
Bookmarks
Bookmark this Post
primes: 1,3,5,7,11,13,17,etc

sum of any two primes is even.

answer = no
User avatar
neelesh
User avatar
Joined: 20 Dec 2004
Last visit: 25 May 2019
Posts: 129
Own Kudos:
653
Posts: 129
Kudos: 653
Can teh positive integer n be written as the sum of two 02 Apr 2008, 08:33
Kudos
Add Kudos
Bookmarks
Bookmark this Post
onyxls1


sum of any two primes is even.

Show more

5 = 2 + 3 (2 & 3 are prime but 5 is not even)
7 = 2 + 5 (2 & 5 are prime but 7 is not even)
9 = 2 + 7 (2 & 7 are prime but 9 is not even)
13 = 2 + 11 (2 & 11 are prime but 13 is not even)
User avatar
FN
User avatar
Current Student
Joined: 28 Dec 2004
Last visit: 07 May 2012
Posts: 1,575
Own Kudos:
687
Given Kudos: 2
Location: New York City
Concentration: Social Enterprise
Schools:Wharton'11 HBS'12
Posts: 1,575
Kudos: 687
Can teh positive integer n be written as the sum of two 02 Apr 2008, 08:37
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I will go with E..

pick 23..23 cannot be expressed as the sum of 2 different primes

13 can be expressed as 11+2
User avatar
walker
User avatar
Joined: 17 Nov 2007
Last visit: 25 May 2025
Posts: 2,396
Own Kudos:
10,860
Given Kudos: 362
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Expert
Expert reply
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Posts: 2,396
Kudos: 10,860
Can teh positive integer n be written as the sum of two 02 Apr 2008, 08:45
Kudos
Add Kudos
Bookmarks
Bookmark this Post
E

1. Let n satisfies both conditions
2. n can be odd only if one of the prime numbers is 2.
3. Therefore, n=p+2
4. p can be prime number (5,7,11,13,17) and can be not prime number (9,15)
5. Therefore, E

we now can also construct two examples:
5=3+2 and 11=9+2
User avatar
GMATBLACKBELT
User avatar
Joined: 29 Mar 2007
Last visit: 03 Jun 2013
Posts: 1,138
Own Kudos:
1,915
Posts: 1,138
Kudos: 1,915
Can teh positive integer n be written as the sum of two 02 Apr 2008, 08:54
Kudos
Add Kudos
Bookmarks
Bookmark this Post
puma
Can teh positive integer n be written as the sum of two different positive prime numbers?

1) n is greater than 3
2) n is odd

many thanks
Show more

E.

Personally I don't like the wording of this DS question. It can be confusing.

The question is asking can it be the sum of two positve prime numbers. Well really we can answer Yes it can be. It should read "IS n the sum of two different positive prime numbers." Just my opionion there.

Anyway when you get these, follow the same rules that apply to all yes and no questions.



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!