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

It is currently 19 Jul 2018, 14:34

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 = 3, which of the following could be the value of x – 4?

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 11 Aug 2009
Posts: 98
If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post Updated on: 25 Dec 2017, 22:56
2
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

68% (00:36) correct 32% (00:29) wrong based on 81 sessions

HideShow timer Statistics

If \(\sqrt{(x+4)^2} = 3\), which of the following could be the value of \(x-4\)?

A. -11
B. -7
C. -4
D. -3
E. 5


OPEN DISCUSSION OF THIS QUESTION IS HERE: if-x-4-2-1-2-3-which-of-the-following-could-be-the-143886.html

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

Originally posted by kairoshan on 18 Nov 2009, 21:38.
Last edited by Bunuel on 25 Dec 2017, 22:56, edited 3 times in total.
OA added.
Manager
Manager
avatar
Joined: 28 Jul 2009
Posts: 92
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 18 Nov 2009, 22:40
The question seems to be incomplete. What is equal to 3?
Manager
Manager
avatar
Joined: 11 Aug 2009
Posts: 98
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 19 Nov 2009, 06:29
Acc3ss wrote:
The question seems to be incomplete. What is equal to 3?


sorry, just edited it. ^^
Manager
Manager
User avatar
Joined: 13 Aug 2009
Posts: 179
Schools: Sloan '14 (S)
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 19 Nov 2009, 08:47
No worries kairoshan,

\sqrt{((x+4)^2)}=3

Then
x+4=-3 OR x+4=3
x=-7 or -1

-7-4=-11
-1-5=-5

ANSWER: A. -11

What is the OA?
Intern
Intern
avatar
Joined: 22 Sep 2009
Posts: 34
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 20 Nov 2009, 07:32
the given expression reduces to
(x+4)^2 - 3^2=0
(x+4+3)(x+4-3)=0
(x-4+11)(x-4+5)=0
x-4=-11 or -5
Ans. A
Retired Moderator
avatar
B
Joined: 16 Nov 2010
Posts: 1467
Location: United States (IN)
Concentration: Strategy, Technology
Premium Member Reviews Badge
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 13 May 2011, 05:30
x = -7

=> x-4 = -11

Answer - A
_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

GMAT Club Premium Membership - big benefits and savings

Manager
Manager
avatar
Status: GMAT in 4 weeks
Joined: 28 Mar 2010
Posts: 168
GPA: 3.89
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 13 May 2011, 13:03
Square root of a square is +ve or -ve.

But it is given that Square of a square has +ve value

then how can x+4 = -3 ?????
_________________

If you liked my post, please consider a Kudos for me. Thanks!

Director
Director
avatar
Joined: 01 Feb 2011
Posts: 683
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 13 May 2011, 20:43
x =-1 or -7

=>x-4 can be -5 or -11


Answer is A.
Intern
Intern
avatar
Joined: 15 Apr 2011
Posts: 6
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 16 May 2011, 11:33
The equation reduces to:
(x+4)^2 = 3^2

So taking the square root on the RHS we get:
x+4 = +/- 3

Now there are 2 possible values:
x+ 4 = 3 and x+4 = -3

You can directly subtract 8 from both the equations to get the answer:
x-4 = (3-8) and x-4 = (-3-8)

Therefore (x-4) has possible values -5 and -11.
Manager
Manager
User avatar
S
Joined: 30 Dec 2015
Posts: 91
GPA: 3.92
WE: Engineering (Aerospace and Defense)
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 08 Oct 2016, 14:26
kairoshan wrote:
If \(\sqrt{(x+4)^2} = 3\), which of the following could be the value of \(x-4\)?

A. -11
B. -7
C. -4
D. -3
E. 5


\((X+4)^2 = 9\)

\((X-4+8)^2 = 9\)
let X-4 = A
\((A+8)^2 = 9\)
Now, sub answer choices in A
A) \((-11+8)^2 = (-3)^2 = 9\)
A is your answer
_________________

If you analyze enough data, you can predict the future.....its calculating probability, nothing more!

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47112
Re: If = 3, which of the following could be the value of x – 4?  [#permalink]

Show Tags

New post 25 Dec 2017, 22:56
If \(\sqrt{(x+4)^2} = 3\), which of the following could be the value of x - 4?

A. -11
B. -7
C. -4
D. -3
E. 5

\(\sqrt{(x+4)^2} = 3\) --> \((x+4)^2=9\) --> \(x+4=3\) or \(x+4=-3\) --> \(x=-1\) or \(x=-7\) --> \(x-4=-5\) or \(x-4=-11\).

Answer: A.


OPEN DISCUSSION OF THIS QUESTION IS HERE: if-x-4-2-1-2-3-which-of-the-following-could-be-the-143886.html

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Re: If = 3, which of the following could be the value of x – 4? &nbs [#permalink] 25 Dec 2017, 22:56
Display posts from previous: Sort by

If = 3, which of the following could be the value of x – 4?

  post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, KarishmaB, Bunuel, niks18

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®.