GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 22 Sep 2018, 17:48

### 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

# What is the value of (k – w ) + (k – x ) + (k – y )?

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 49303
What is the value of (k – w ) + (k – x ) + (k – y )?  [#permalink]

### Show Tags

21 Jan 2018, 03:19
00:00

Difficulty:

45% (medium)

Question Stats:

61% (01:12) correct 39% (01:29) wrong based on 100 sessions

### HideShow timer Statistics

What is the value of (k – w ) + (k – x ) + (k – y )?

(1) w, x, and y are three consecutive odd numbers
(2) The mean of w, x, and y is k

_________________
PS Forum Moderator
Joined: 25 Feb 2013
Posts: 1214
Location: India
GPA: 3.82
What is the value of (k – w ) + (k – x ) + (k – y )?  [#permalink]

### Show Tags

21 Jan 2018, 03:26
1
Bunuel wrote:
What is the value of (k – w ) + (k – x ) + (k – y )?

(1) w, x, and y are three consecutive odd numbers
(2) The mean of w, x, and y is k

$$k-w+k-x+k-y=3k-(w+x+y)$$

Statement 1: nothing mentioned about $$k$$. Insufficient

Statement 2: implies $$w+x+y=3k$$. Hence our stem equation will be $$3k-3k=0$$. Sufficient

Option B
Senior Manager
Joined: 06 Jan 2015
Posts: 476
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE: Information Technology (Computer Software)
Re: What is the value of (k – w ) + (k – x ) + (k – y )?  [#permalink]

### Show Tags

21 Jan 2018, 03:28
Bunuel wrote:
What is the value of (k – w ) + (k – x ) + (k – y )?

(1) w, x, and y are three consecutive odd numbers
(2) The mean of w, x, and y is k

Modify the Que as 3k-(w+x+y)

1) w, x, and y are three consecutive odd numbers
We don't know the value of k, hence not suff

2) The mean of w, x, and y is k

w+x+y/3=k

It means w+x+y =3k hence gives ans as 0

Hence Suff

B
_________________

आत्मनॊ मोक्षार्थम् जगद्धिताय च

Resource: GMATPrep RCs With Solution

CEO
Joined: 12 Sep 2015
Posts: 2878
Location: Canada
Re: What is the value of (k – w ) + (k – x ) + (k – y )?  [#permalink]

### Show Tags

28 Aug 2018, 14:15
Top Contributor
Bunuel wrote:
What is the value of (k – w ) + (k – x ) + (k – y )?

(1) w, x, and y are three consecutive odd numbers
(2) The mean of w, x, and y is k

Target question: What is the value of (k – w ) + (k – x ) + (k – y )?
This is a good candidate for rephrasing the target question.

Take: (k – w ) + (k – x ) + (k – y )
Simplify to get: 3k – w – x – y
Rewrite as: 3k – (w + x + y)

REPHRASED target question: What is the value of 3k – (w + x + y) ?

Aside: The video below has tips on rephrasing the target question

Statement 1: w, x, and y are three consecutive odd numbers
Since we have no information about k, there's no way to determine the value of 3k – (w + x + y)
Since we cannot answer the REPHRASED target question with certainty, statement 1 is NOT SUFFICIENT

Statement 2: The mean of w, x, and y is k
This tells us that (w + x + y)/3 = k
Multiply both sides by 3 to get: w + x + y = 3k
If w + x + y = 3k, then 3k – (w + x + y) = 3k – (3k) = 0
Perfect, the answer to the REPHRASED target question is 0
Since we can answer the REPHRASED target question with certainty, statement 2 is SUFFICIENT

Answer: B

RELATED VIDEO FROM OUR COURSE

_________________

Brent Hanneson – GMATPrepNow.com

Sign up for our free Question of the Day emails

Re: What is the value of (k – w ) + (k – x ) + (k – y )? &nbs [#permalink] 28 Aug 2018, 14:15
Display posts from previous: Sort by

# What is the value of (k – w ) + (k – x ) + (k – y )?

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

## Events & Promotions

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.