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

 It is currently 18 Apr 2015, 08:42

### 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

# Number property

Author Message
TAGS:
Manager
Joined: 02 Sep 2008
Posts: 103
Followers: 1

Kudos [?]: 29 [0], given: 1

Number property [#permalink]  25 Mar 2009, 22:11
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
If n is a positive integer, which of the following is a possible value of |56 - 5n|?
A. 7
B. 9
C. 12
D. 15
E. 20
Director
Joined: 25 Oct 2008
Posts: 610
Location: Kolkata,India
Followers: 9

Kudos [?]: 285 [0], given: 100

Re: Number property [#permalink]  02 Jul 2009, 03:40
could somebody please provide the explanation of the fastest way of doing this problem?
_________________
Manager
Joined: 16 Apr 2009
Posts: 246
Schools: Ross
Followers: 2

Kudos [?]: 38 [0], given: 10

Re: Number property [#permalink]  02 Jul 2009, 04:03
Quote:
If n is a positive integer, which of the following is a possible value of |56 - 5n|?
A. 7
B. 9
C. 12
D. 15
E. 20

|56 - 5n|

and n is an integer.

Now plug in numbers to n such that you can justify one of the answer choices.

|56-5(10)| =|56-50|=6
|56-5(9)| =|56-45|=11

|56-5(13)| =|56-65|=|-9| =9

Hope this helped..
_________________

Keep trying no matter how hard it seems, it will get easier.

CEO
Joined: 17 Nov 2007
Posts: 3578
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 404

Kudos [?]: 2116 [0], given: 359

Re: Number property [#permalink]  02 Jul 2009, 09:31
Expert's post
another way:

As only one option is correct, there is no other option that differs by +/- 5x. Because if 56-5n is a solution, 56-5(n +/- x) is also solution. 5,12 and 15,20 cannot be solution. So, 9 is our answer.
_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

Re: Number property   [#permalink] 02 Jul 2009, 09:31
Similar topics Replies Last post
Similar
Topics:
Number properties?!?!?! 0 09 Nov 2006, 06:17
Number Property 4 19 Sep 2006, 15:04
Number Properties 3 10 Sep 2006, 11:43
Number properties 6 03 Apr 2006, 19:00
Number Properties 3 19 Oct 2005, 17:14
Display posts from previous: Sort by