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

It is currently 22 Nov 2018, 03:34

Thanksgiving Holiday

GMAT Club Tests are Free and Open until midnight Nov 22, Pacific Time


Close

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
  • Key Strategies to Master GMAT SC

     November 24, 2018

     November 24, 2018

     07:00 AM PST

     09:00 AM PST

    Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.
  • GMATbuster's Weekly GMAT Quant Quiz

     November 24, 2018

     November 24, 2018

     09:00 AM PST

     11:00 AM PST

    We will start promptly at 09 AM Pacific Time. Quiz will last approximately 2 hours. Make sure you are on time or you will be at a disadvantage.

What is the value of x+y, if x and y are real numbers? (1) x-y = 4

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

Hide Tags

DS Forum Moderator
avatar
P
Joined: 21 Aug 2013
Posts: 1375
Location: India
Premium Member
What is the value of x+y, if x and y are real numbers? (1) x-y = 4  [#permalink]

Show Tags

New post 23 Jul 2018, 20:13
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

41% (01:13) correct 59% (01:48) wrong based on 27 sessions

HideShow timer Statistics

What is the value of x+y, if x and y are real numbers?

(1) x-y = 4

(2) (x+y)^2 = 16
MBA Section Director
User avatar
D
Affiliations: GMATClub
Joined: 22 May 2017
Posts: 1041
Concentration: Nonprofit
GPA: 4
WE: Engineering (Computer Software)
Re: What is the value of x+y, if x and y are real numbers? (1) x-y = 4  [#permalink]

Show Tags

New post 23 Jul 2018, 21:17
To find the value of x + y

Statement 1

x - y = 4

=> x can be 6 y can be 2 => x + y can be 8
=> x can be 7 y can be 3 => x + y can be 10

Statement 1 is not sufficient

Statement 2

\((x + y)^2 = 16\)

=> x can be 2 y can be 2 => x + y can be 4
=> x can be -2 y can be -2 => x + y can be -4

Statement 2 is not sufficient

Combining statements 1 and 2

from statement 1, we have x = y + 4

\((x + y)^2 = 16\)

=> \((2y + 4)^2 = 16\)

=> (2y + 4) = 4 or (2y + 4) = -4

=> y = 0 or y = -4

=> x = 4 or x = 0

=> x + y can be either 4 or -4

Statements 1 and 2 together are not sufficient

Hence option E
_________________

New project wSTAT(which Schools To Apply To?)

B-School app with GRE

New - RC Butler - 2 RC's everyday

GMAT Club Bot
Re: What is the value of x+y, if x and y are real numbers? (1) x-y = 4 &nbs [#permalink] 23 Jul 2018, 21:17
Display posts from previous: Sort by

What is the value of x+y, if x and y are real numbers? (1) x-y = 4

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


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

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®.