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

It is currently 16 Feb 2019, 17:38

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 February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Free GMAT Algebra Webinar

     February 17, 2019

     February 17, 2019

     07:00 AM PST

     09:00 AM PST

    Attend this Free Algebra Webinar and learn how to master Inequalities and Absolute Value problems on GMAT.
  • Free GMAT Strategy Webinar

     February 16, 2019

     February 16, 2019

     07:00 AM PST

     09:00 AM PST

    Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

Is (x + y)^(1/2) an integer? (1) x^3 = 64 (2) x^2 = y – 3

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

Hide Tags

 
Intern
Intern
User avatar
B
Joined: 08 Sep 2018
Posts: 3
Location: India
Is (x + y)^(1/2) an integer? (1) x^3 = 64 (2) x^2 = y – 3  [#permalink]

Show Tags

New post Updated on: 02 Oct 2018, 23:10
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

82% (01:26) correct 18% (01:22) wrong based on 55 sessions

HideShow timer Statistics

Is √(x + y) an integer?

(1) x^3 = 64
(2) x^2 = y – 3

Originally posted by HariS1992 on 02 Oct 2018, 23:00.
Last edited by Bunuel on 02 Oct 2018, 23:10, edited 1 time in total.
Renamed the topic.
Senior PS Moderator
User avatar
V
Joined: 26 Feb 2016
Posts: 3340
Location: India
GPA: 3.12
Premium Member
Re: Is (x + y)^(1/2) an integer? (1) x^3 = 64 (2) x^2 = y – 3  [#permalink]

Show Tags

New post 02 Oct 2018, 23:07
HariS1992 wrote:
Is √(x + y) an integer?

(1) x^3 = 64
(2) x^2 = y – 3



1. x^3 = 64
We can get the value of x = 4, but without the value of y - we can't
say whether √(x + y) is an integer. (Insufficient)

2. x^2 = y – 3
If x = 1 and y = 4, then √(x + y) is not an integer
If x = 2 and y = 7, then √(x + y) is an integer (Insufficient)

On combining the information in both the statements, we can clearly
get a unique value of x and y and √(x + y) is not an integer (Sufficient - Option C)

Btw, are you sure this is from the OG - 2017(because if it is - it must have definitely been discussed)
_________________

You've got what it takes, but it will take everything you've got

Intern
Intern
avatar
B
Joined: 30 Jun 2017
Posts: 8
GMAT 1: 670 Q50 V29
Re: Is (x + y)^(1/2) an integer? (1) x^3 = 64 (2) x^2 = y – 3  [#permalink]

Show Tags

New post 03 Oct 2018, 01:59
I think OA should be B

because sqrt(x^2 + x + 3) will never be a perfect square for any integer value of x
Director
Director
avatar
P
Joined: 02 Oct 2017
Posts: 734
Re: Is (x + y)^(1/2) an integer? (1) x^3 = 64 (2) x^2 = y – 3  [#permalink]

Show Tags

New post 03 Oct 2018, 05:49
1
vipulkhandelwal999 wrote:
I think OA should be B

because sqrt(x^2 + x + 3) will never be a perfect square for any integer value of x



Take x as -3
U will get your answer
_________________

Give kudos if you like the post

GMAT Club Bot
Re: Is (x + y)^(1/2) an integer? (1) x^3 = 64 (2) x^2 = y – 3   [#permalink] 03 Oct 2018, 05:49
Display posts from previous: Sort by

Is (x + y)^(1/2) an integer? (1) x^3 = 64 (2) x^2 = y – 3

  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®.