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

 It is currently 03 May 2015, 15:05

### 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

# Possible value

Author Message
TAGS:
SVP
Joined: 04 May 2006
Posts: 1936
Schools: CBS, Kellogg
Followers: 19

Kudos [?]: 441 [0], given: 1

Possible value [#permalink]  31 May 2009, 01:40
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|?

7
9
12
15
20

Dont know why the OA is OA

_________________
Manager
Joined: 12 Apr 2006
Posts: 218
Location: India
Followers: 1

Kudos [?]: 24 [0], given: 17

Re: Possible value [#permalink]  31 May 2009, 05:03
As n is a positive integer, 5n would be a multiple of 5 and unit digit will always be either 5 or 0

Now consider the possible scenarios

When the unit digit of 5n is 5,

56 - x5 = y1 (x and y can be anything here, we are just concerned with unit digit)
x5 - 56 = y9

When the unit digit of 5n is 0,

56 - x0 = y6
x0 - 56 = y4

With both these conditions we have only four possibles values of unit digit, that is 1, 9, 6, and 4.

In the given options only 9 satisfy this, hence the answer.
Senior Manager
Joined: 16 Jan 2009
Posts: 361
Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)
Followers: 3

Kudos [?]: 90 [0], given: 16

Re: Possible value [#permalink]  31 May 2009, 15:28
|56 - 5n|=9 for n=13.
looking for difference of 1 makes it easier.
_________________

Lahoosaher

Manager
Joined: 16 Apr 2009
Posts: 246
Schools: Ross
Followers: 2

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

Re: Possible value [#permalink]  31 May 2009, 16:02
Quote:
If n is a positive integer, which of the following is a possible value of |56 - 5n|?

7
9
12
15
20

OA-9
|56- 5n|
5n will end with either 0 or 5
|56-5*10| =|56-50|=6
|56-5*9|=|56-45|=11
|56-5*13|=|56-65|=9
|56-5*14|=|56-70|=14
|56-5*15|=|56-75|=19

Hence 9
_________________

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

Intern
Joined: 12 May 2009
Posts: 48
Location: Mumbai
Followers: 1

Kudos [?]: 3 [0], given: 1

Re: Possible value [#permalink]  01 Jun 2009, 04:23
n will be either 0 or 5 as it is multiplied by 5,

Trying out for options
|56-5*9| = |56-45| = 11
|56-5*10| = 6
|56-5*11| = 1
|56-5*12| = 4
|56-5*13| = 9

OA is B
Re: Possible value   [#permalink] 01 Jun 2009, 04:23
Similar topics Replies Last post
Similar
Topics:
1 Least possible value of n 4 11 Jan 2010, 04:24
least possible value 7 24 Nov 2009, 07:06
Smallest possible value of x 0 09 Nov 2009, 21:01
1 possible value of n 8 25 Jun 2008, 02:52
1 The possibility that the value of stock A will increase is 17 03 Dec 2005, 22:31
Display posts from previous: Sort by