Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 03 May 2015, 22:26

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If n is a positive integer and r is the remainder when 4 +

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Director
Joined: 06 Sep 2006
Posts: 745
Followers: 1

Kudos [?]: 17 [0], given: 0

If n is a positive integer and r is the remainder when 4 + [#permalink]  22 Jul 2007, 14:04
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
If n is a positive integer and r is the remainder when 4 + 7n is divided by 3, what is the value of r?

(1) n + 1 is divisible by 3.
(2) n > 3
Senior Manager
Joined: 28 Jun 2007
Posts: 463
Followers: 2

Kudos [?]: 5 [0], given: 0

[#permalink]  22 Jul 2007, 14:21
A alone is sufficient.

4 + 7(3x-1) = 21x + 3. It will be always divisible by 3.

Second is clearly insuffiicent
Manager
Joined: 27 May 2007
Posts: 128
Followers: 1

Kudos [?]: 4 [0], given: 0

[#permalink]  22 Jul 2007, 14:58
ioiio wrote:
A alone is sufficient.

4 + 7(3x-1) = 21x + 3. It will be always divisible by 3.

Second is clearly insuffiicent

ioiio,
Could you show step by step how you set that up? I have trouble with this type of problem.

thanks
Senior Manager
Joined: 28 Jun 2007
Posts: 463
Followers: 2

Kudos [?]: 5 [0], given: 0

[#permalink]  22 Jul 2007, 15:33
Robin in NC wrote:
ioiio wrote:
A alone is sufficient.

4 + 7(3x-1) = 21x + 3. It will be always divisible by 3.

Second is clearly insuffiicent

ioiio,
Could you show step by step how you set that up? I have trouble with this type of problem.

thanks

From A, n + 1 is divisible by 3.
So n+1 = 3x. x is an unknown integer.
so n = 3x-1.

4 + 7 (3x -1) = 21x - 3.
Dividing it by 3
It reduces to 7x - 1 and you can see that there cant be any reminder when x is an integer.

Hope that helps.
[#permalink] 22 Jul 2007, 15:33
Similar topics Replies Last post
Similar
Topics:
If n is a positive integer and r is the remainder when 4 + 2 30 Apr 2008, 00:50
If N is a positive integer and R is the remainder when 4+7N 3 09 Sep 2007, 13:41
6 If n is a positive integer and r is the remainder when 4+7n 5 20 Aug 2007, 19:04
If n is a positive integer and r is the remainder when 4+7n 6 15 Sep 2006, 17:15
If n is a positive integer and r is the remainder when 4+7n 2 01 Oct 2005, 10:30
Display posts from previous: Sort by

# If n is a positive integer and r is the remainder when 4 +

 Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO 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®.