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

 It is currently 24 Jun 2016, 19:36

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

when n is devided by 4, the remiander is 3. the remainder

Author Message
SVP
Joined: 28 Dec 2005
Posts: 1575
Followers: 3

Kudos [?]: 122 [0], given: 2

when n is devided by 4, the remiander is 3. the remainder [#permalink]

Show Tags

05 Oct 2007, 15:07
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

when n is devided by 4, the remiander is 3. the remainder when 2n is devided by 4 is

a] 1
b] 2
c] 3
d] 6
e] 4

I am sort of on the right track here, but cant quite understand the last step. Ill post the OA in a bit. Oh, post your explanations as well
VP
Joined: 08 Jun 2005
Posts: 1146
Followers: 6

Kudos [?]: 164 [0], given: 0

Show Tags

05 Oct 2007, 15:28
n/4 = y & remiander(3)

This can be expressed as:

4*y+3 = n

and

2*n = 2*(4*y+3) = 8*y+6

Easy to test ---> assume y=2

See bluebird's post

Last edited by KillerSquirrel on 05 Oct 2007, 15:54, edited 1 time in total.
Manager
Joined: 18 Apr 2007
Posts: 121
Followers: 1

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

Show Tags

05 Oct 2007, 15:42
I'm getting B....

n/4 = Q+3
Therefore, n=7,11,15,19,etc.

Using these values, 2n = 14,22,30,38,etc.
each of these values divided by 4 leaves a remainder of 2

Director
Joined: 22 Aug 2007
Posts: 567
Followers: 1

Kudos [?]: 31 [0], given: 0

Show Tags

05 Oct 2007, 15:43
pmenon wrote:
when n is devided by 4, the remiander is 3. the remainder when 2n is devided by 4 is

a] 1
b] 2
c] 3
d] 6
e] 4

I am sort of on the right track here, but cant quite understand the last step. Ill post the OA in a bit. Oh, post your explanations as well

B,

remainder is also multiplied by 2, so 6/4=1 plus remainder 2/4.

EDITTED*

Last edited by IrinaOK on 05 Oct 2007, 17:10, edited 1 time in total.
VP
Joined: 08 Jun 2005
Posts: 1146
Followers: 6

Kudos [?]: 164 [0], given: 0

Show Tags

05 Oct 2007, 15:49
Bluebird wrote:
I'm getting B....

n/4 = Q+3
Therefore, n=7,11,15,19,etc.

Using these values, 2n = 14,22,30,38,etc.
each of these values divided by 4 leaves a remainder of 2

Yes you are correct !

VP
Joined: 09 Jul 2007
Posts: 1104
Location: London
Followers: 6

Kudos [?]: 95 [0], given: 0

Show Tags

05 Oct 2007, 16:02
pmenon wrote:
when n is devided by 4, the remiander is 3. the remainder when 2n is devided by 4 is

a] 1
b] 2
c] 3
d] 6
e] 4

I am sort of on the right track here, but cant quite understand the last step. Ill post the OA in a bit. Oh, post your explanations as well

the best strategy to apply is picking numbers to save time;

7 fine remainder 3, ----> 14 remainder is 2
15 fine remainder 3, ----> 30 remainder is 2
19 fine remainder 3, -----> 38 remainder is 2

so B
SVP
Joined: 28 Dec 2005
Posts: 1575
Followers: 3

Kudos [?]: 122 [0], given: 2

Show Tags

05 Oct 2007, 18:46
OA is B

I was approaching the question using formulas, but got stuck at this point:

n=4q+3

2n=8q+6

from here, without picking numbers, how do you figure out that the remainder is 2 ?
VP
Joined: 09 Jul 2007
Posts: 1104
Location: London
Followers: 6

Kudos [?]: 95 [0], given: 0

Show Tags

06 Oct 2007, 00:03
pmenon wrote:
OA is B

I was approaching the question using formulas, but got stuck at this point:

n=4q+3

2n=8q+6

from here, without picking numbers, how do you figure out that the remainder is 2 ?

i would not even attempt it with formulaes. now try to divide the final equation by four. u will not have chance to determine it then.

better use picking numbers as u save time for other questions
Display posts from previous: Sort by