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

It is currently 18 Jul 2018, 19:21

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

If xy ≠ 0, what is the value of x

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

Hide Tags

1 KUDOS received
Manager
Manager
User avatar
Joined: 03 Jul 2013
Posts: 90
Schools: ISB '17 (A), IIMC (A)
GMAT 1: 660 Q48 V32
If xy ≠ 0, what is the value of x [#permalink]

Show Tags

New post Updated on: 04 Oct 2014, 04:14
1
3
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

64% (00:41) correct 36% (00:42) wrong based on 184 sessions

HideShow timer Statistics

If xy ≠ 0, what is the value of x?

(1) yx^2 + 4xy + 4y = 0
(2) y = 6

_________________

Sometimes standing still can be, the best move you ever make......


Originally posted by aadikamagic on 04 Oct 2014, 01:10.
Last edited by Bunuel on 04 Oct 2014, 04:14, edited 1 time in total.
Edited the question.
1 KUDOS received
Senior Manager
Senior Manager
User avatar
Joined: 13 Jun 2013
Posts: 277
Premium Member
Re: If xy ≠ 0, what is the value of x [#permalink]

Show Tags

New post 04 Oct 2014, 02:24
1
aadikamagic wrote:
If xy≠0, what is the value of x?

(1) yx^2+4xy+4y=0
(2) y=6
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked
Both statements (1) and (2) TOGETHER are sufficient to answer the question asked; but NEITHER statement ALONE is sufficient
EACH statement ALONE is sufficient to answer the question asked
Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed


st. 1

y(x^2+4x+4)=0

y(x+2)^2=0;

now y cannot be zero as per the question. thus (x+2)^2=0;

i.e. x=-2
hence sufficient

st. 2 y=6

doesn't tell anything about x. hence insufficient.

answer should be A
DS Forum Moderator
avatar
P
Joined: 22 Aug 2013
Posts: 1280
Location: India
Premium Member
Re: If xy ≠ 0, what is the value of x [#permalink]

Show Tags

New post 02 Dec 2017, 01:11
aadikamagic wrote:
If xy ≠ 0, what is the value of x?

(1) yx^2 + 4xy + 4y = 0
(2) y = 6



(1) y (x^2+4x+4) = 0 OR y (x+2)^2 = 0
So either y = 0 or (x+2)^2 = 0 or both. But since we are given that neither of x or y could be 0, we can conclude that (x+2)^2 = 0 or x=-2
Sufficient.

(2) y=6, clearly not sufficient to find x.

Hence A answer
Re: If xy ≠ 0, what is the value of x   [#permalink] 02 Dec 2017, 01:11
Display posts from previous: Sort by

If xy ≠ 0, what is the value of x

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

Events & Promotions

PREV
NEXT


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®.