Summer is Coming! Join the Game of Timers Competition to Win Epic Prizes. Registration is Open. Game starts Mon July 1st.

It is currently 18 Jul 2019, 06:19

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

What is the value of xy? (1) y = x + 1 (2) y = x^2 + 1

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

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 56251
What is the value of xy? (1) y = x + 1 (2) y = x^2 + 1  [#permalink]

Show Tags

New post 23 Sep 2018, 21:30
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

73% (01:23) correct 27% (01:03) wrong based on 133 sessions

HideShow timer Statistics


Intern
Intern
User avatar
B
Joined: 11 Apr 2018
Posts: 19
Concentration: Entrepreneurship
Re: What is the value of xy? (1) y = x + 1 (2) y = x^2 + 1  [#permalink]

Show Tags

New post 24 Sep 2018, 21:05
1) y = x + 1
Not sufficient

(2) y = x^2 + 1
Not Sufficient

combining both 1 and 2
X+1=X^2+1
X(X-1)=0
X=0,X=1
If X=0 then XY=0,but If X=1 then XY=Y clearly not sufficient
CEO
CEO
User avatar
D
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2959
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
Re: What is the value of xy? (1) y = x + 1 (2) y = x^2 + 1  [#permalink]

Show Tags

New post 25 Sep 2018, 23:40
Bunuel wrote:
What is the value of xy?


(1) y = x + 1

(2) y = x^2 + 1


Question: What is the value of xy?

Statement 1: \(y = x + 1\)

x and y both are unknown hence
NOT SUFFICIENT

Statement 2: \(y = x^2 + 1\)

x and y both are unknown hence
NOT SUFFICIENT

Combining the two statements

\(y = x+1 = x^2 + 1\)

i.e. \(x = x^2\)
i.e. \(x = 0\) and \(y = 1\) or \(x = 1\) and \(y = 2\)
i.e. \(xy = 0\) or \(xy = 2\)

NOT SUFFICIENT

Answer: Option E
_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
GMAT Club Bot
Re: What is the value of xy? (1) y = x + 1 (2) y = x^2 + 1   [#permalink] 25 Sep 2018, 23:40
Display posts from previous: Sort by

What is the value of xy? (1) y = x + 1 (2) y = x^2 + 1

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





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