Find all School-related info fast with the new School-Specific MBA Forum

It is currently 25 Aug 2016, 06:14
GMAT Club Tests

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If x # y = –1, which of the following could be true?

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

Hide Tags

Senior Manager
Senior Manager
User avatar
Joined: 03 Mar 2010
Posts: 440
Schools: Simon '16 (M)
Followers: 5

Kudos [?]: 239 [0], given: 22

If x # y = –1, which of the following could be true? [#permalink]

Show Tags

New post 14 Sep 2011, 06:48
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

53% (02:28) correct 47% (01:27) wrong based on 19 sessions

HideShow timer Statistics

x#y= (x−y)^2, if x>y
x#y= x+\(y/4\), if x≤y

If x # y = –1, which of the following could be true?

I. x=y
II. x>y
III. x<y

(A) I only
(B) II only
(C) III only
(D) I and III only
(E) I, II, and III
[Reveal] Spoiler: OA

_________________

My dad once said to me: Son, nothing succeeds like success.

Math Forum Moderator
avatar
Joined: 20 Dec 2010
Posts: 2021
Followers: 157

Kudos [?]: 1557 [0], given: 376

Re: If x # y = –1, which of the following could be true? [#permalink]

Show Tags

New post 14 Sep 2011, 08:09
jamifahad wrote:
As always, post your timing for below question, if possible.

x#y= (x−y)^2, if x>y
x#y= x+\(y/4\), if x≤y

If x # y = –1, which of the following could be true?
I. x=y
II. x>y
III. x<y
(A) I only
(B) II only
(C) III only
(D) I and III only
(E) I, II, and III


(2:05)

A square can never be -ve, ruled out II.

For x=y;

x+x/4=-1; 5x=-4; x=-4/5. Possible

For x>y
x+y/4=-1

x=-1-y/4=-(y+4)/4; y=-4, x=0. Possible.

Ans: "D"
_________________

~fluke

GMAT Club Premium Membership - big benefits and savings

1 KUDOS received
Senior Manager
Senior Manager
User avatar
Joined: 03 Mar 2010
Posts: 440
Schools: Simon '16 (M)
Followers: 5

Kudos [?]: 239 [1] , given: 22

Re: If x # y = –1, which of the following could be true? [#permalink]

Show Tags

New post 14 Sep 2011, 08:25
1
This post received
KUDOS
fluke wrote:
For x>y
x+y/4=-1

x=-1-y/4=-(y+4)/4; y=-4, x=0. Possible.


This should be x<y.
Other than that flawless. :lol:

This custom character sometimes puzzles me.
_________________

My dad once said to me: Son, nothing succeeds like success.

Math Forum Moderator
avatar
Joined: 20 Dec 2010
Posts: 2021
Followers: 157

Kudos [?]: 1557 [0], given: 376

Re: If x # y = –1, which of the following could be true? [#permalink]

Show Tags

New post 14 Sep 2011, 08:39
jamifahad wrote:
fluke wrote:
For x>y
x+y/4=-1

x=-1-y/4=-(y+4)/4; y=-4, x=0. Possible.


This should be x<y.
Other than that flawless. :lol:

This custom character sometimes puzzles me.


That's right. thanks
_________________

~fluke

GMAT Club Premium Membership - big benefits and savings

Senior Manager
Senior Manager
User avatar
Joined: 11 May 2011
Posts: 373
Location: US
Followers: 3

Kudos [?]: 89 [0], given: 46

Re: If x # y = –1, which of the following could be true? [#permalink]

Show Tags

New post 14 Sep 2011, 14:16
Time: 1:00 min.

Approach -
Since, x # y = –1
=> x#y= (x−y)^2, if x>y - This equation is not possible becasue any square will yield positive value.
=> x#y= x+y/4, if x≤y - This equation is only possible and as it says - x≤y, Hence - D.

Cheers!
_________________

-----------------------------------------------------------------------------------------
What you do TODAY is important because you're exchanging a day of your life for it!
-----------------------------------------------------------------------------------------

Re: If x # y = –1, which of the following could be true?   [#permalink] 14 Sep 2011, 14:16
    Similar topics Author Replies Last post
Similar
Topics:
3 Experts publish their posts in the topic If x/|y| = -1 which of the following must be true? Avigano 7 17 Jul 2016, 10:36
1 Experts publish their posts in the topic If (1+x)y=y, which of the following must be true? MathRevolution 3 01 Jul 2016, 02:27
2 Experts publish their posts in the topic If −1<x<5, which is the following could be true? Bunuel 3 04 Feb 2015, 08:53
9 Experts publish their posts in the topic If x > 0, which of the following could be true? Bunuel 7 03 Dec 2014, 08:18
6 If x>y & 1/x<1/y, which of the following could be true Game 1 20 Jul 2014, 18:36
Display posts from previous: Sort by

If x # y = –1, which of the following could be true?

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


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.