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

It is currently 17 Aug 2019, 13:53

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 x?

  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: 57025
What is the value of x?  [#permalink]

Show Tags

New post 13 Mar 2018, 08:33
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

75% (01:21) correct 25% (01:25) wrong based on 63 sessions

HideShow timer Statistics

RC Moderator
User avatar
V
Joined: 24 Aug 2016
Posts: 806
GMAT 1: 540 Q49 V16
GMAT 2: 680 Q49 V33
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Re: What is the value of x?  [#permalink]

Show Tags

New post 13 Mar 2018, 10:19
1. rt x^4 = 9 => x= -3, +3 NS
2. x^2 + 6x + 3 = -6 => (x+3)=0 or -(x+3)=0 => x= -3, +3 NS
1. & 2. x= -3, +3 NS

Thus E
_________________
Please let me know if I am going in wrong direction.
Thanks in appreciation.
Retired Moderator
avatar
P
Joined: 22 Aug 2013
Posts: 1434
Location: India
Re: What is the value of x?  [#permalink]

Show Tags

New post 13 Mar 2018, 10:48
u1983 wrote:
1. rt x^4 = 9 => x= -3, +3 NS
2. x^2 + 6x + 3 = -6 => (x+3)=0 or -(x+3)=0 => x= -3, +3 NS
1. & 2. x= -3, +3 NS

Thus E


Hello

As per your second statement analysis:
whether x+3 = 0 or -(x+3) = 0 ; isnt x always going to be '-3' only? So isnt the second statement sufficient on its own?
RC Moderator
User avatar
V
Joined: 24 Aug 2016
Posts: 806
GMAT 1: 540 Q49 V16
GMAT 2: 680 Q49 V33
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Re: What is the value of x?  [#permalink]

Show Tags

New post 13 Mar 2018, 11:03
yes.... u r rt... missed that part ... in that case B
_________________
Please let me know if I am going in wrong direction.
Thanks in appreciation.
Intern
Intern
avatar
B
Joined: 23 Jul 2015
Posts: 34
Reviews Badge
What is the value of x?  [#permalink]

Show Tags

New post 13 Mar 2018, 18:51
1
1) \(\sqrt{x^4}\) = 9
\(x^\frac{4}{2}\) = 9
\(x^2\) = 9
x= +3 or -3
insuff

(2) The average (arithmetic mean) of x^2, 6x, and 3 is -2

\(\frac{x^2+6x+3}{3}\)= -2
\(x^2+6x+3\) = -6
\(x^2+6x+9 = 0\)
(x+3) (x+3) = 0
x=-3
suff


ans
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 12005
Re: What is the value of x?  [#permalink]

Show Tags

New post 11 Aug 2019, 16:38
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Club Bot
Re: What is the value of x?   [#permalink] 11 Aug 2019, 16:38
Display posts from previous: Sort by

What is the value of x?

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





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