It is currently 21 Feb 2018, 13:14

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Is the negative number x less than –1?

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

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 43853
Is the negative number x less than –1? [#permalink]

Show Tags

New post 14 May 2017, 11:24
Expert's post
3
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

61% (01:17) correct 39% (01:19) wrong based on 48 sessions

HideShow timer Statistics

Director
Director
User avatar
P
Joined: 28 Mar 2017
Posts: 891
CAT Tests
Re: Is the negative number x less than –1? [#permalink]

Show Tags

New post 14 May 2017, 11:35
Bunuel wrote:
Is the negative number x less than –1?

(1) 1/x < 1/2
(2) 1/x^2 < 1/2


E

1. stmt 1 will hold true for x=-2 and for x=-0.5
insufficient

2. for x<-2, the given condition holds true
for -2<x<-1, the given condition fails,
for -1<x<0, the condition condition fails
insufficient

1&2 clearly insufficient
_________________

Kudos if my post helps!

Helpful links:
1. Useful Formulae, Concepts and Tricks-Quant
2. e-GMAT's ALL SC Compilation
3. LSAT RC compilation
4. Actual LSAT CR collection by Broal
5. QOTD RC (Carcass)
6. Challange OG RC

Manager
Manager
avatar
S
Joined: 04 Apr 2015
Posts: 101
Re: Is the negative number x less than –1? [#permalink]

Show Tags

New post 15 May 2017, 01:03
1
This post was
BOOKMARKED
IMO B

x has to be less than -1from statetment 2

waiting for the OA
Intern
Intern
avatar
B
Joined: 27 Dec 2012
Posts: 41
Re: Is the negative number x less than –1? [#permalink]

Show Tags

New post 15 May 2017, 01:25
Statement 1:
1/x-1/2<0
2-x/2x<0
As x<0
This gives us
x<2
No new information
Insufficient
Statement 2:
1/x^2-1/2<0
x^2>2
This confirms x<-1
Sufficient
B
1 KUDOS received
Senior Manager
Senior Manager
User avatar
G
Joined: 23 Jun 2012
Posts: 344
Location: Pakistan
Concentration: Strategy, International Business
GPA: 3.76
GMAT ToolKit User Reviews Badge
Re: Is the negative number x less than –1? [#permalink]

Show Tags

New post 15 May 2017, 01:34
1
This post received
KUDOS
For me its B
if 1/x^2 < 1/2 then we can write this as
x^2 > 2...and it is only possible when x is > 1 and as we are given that x is negative this means x is negative number greater than 1
_________________

Push yourself again and again. Don't give an inch until the final buzzer sounds. -Larry Bird
Success isn't something that just happens - success is learned, success is practiced and then it is shared. -Sparky Anderson
-S

Manager
Manager
avatar
G
Joined: 14 Oct 2015
Posts: 238
GPA: 3.57
Reviews Badge CAT Tests
Re: Is the negative number x less than –1? [#permalink]

Show Tags

New post 15 May 2017, 02:05
IMO its B -

1- \(1/x < 1/2\)
\(2/x < 1\)
\(x < 2\) -- we flip signs because we know X is negative and we're taking negative to the other side, or so I think we should do.

2- \(1/x^2 < 1/2\)

flipping sides, sign remains the same since we're dealing with \(x^2\)

\(x^2 > 2\) taking under root, we will be flipping the sign since we know x is negative.
\(x < 1.41\) - Not sufficient.


Combining both, we know x < 2 and and less than 1.41 but its still not sufficient to determine if X is less than -1. Answer should be E IMO. I may be making a dumb mistake so would love it if someone can correct me.
_________________

Please hit Kudos if this post helped you inch closer to your GMAT goal.
Procrastination is the termite constantly trying to eat your GMAT tree from the inside.
There is one fix to every problem, working harder!

Director
Director
User avatar
P
Joined: 28 Mar 2017
Posts: 891
CAT Tests
Re: Is the negative number x less than –1? [#permalink]

Show Tags

New post 15 May 2017, 03:29
gmatexam439 wrote:
Bunuel wrote:
Is the negative number x less than –1?

(1) 1/x < 1/2
(2) 1/x^2 < 1/2


E

1. stmt 1 will hold true for x=-2 and for x=-0.5
insufficient

2. for x<-2, the given condition holds true
for -2<x<-1, the given condition fails,
for -1<x<0, the condition condition fails
insufficient

1&2 clearly insufficient



I understand it should be "B" and not "E".
_________________

Kudos if my post helps!

Helpful links:
1. Useful Formulae, Concepts and Tricks-Quant
2. e-GMAT's ALL SC Compilation
3. LSAT RC compilation
4. Actual LSAT CR collection by Broal
5. QOTD RC (Carcass)
6. Challange OG RC

Re: Is the negative number x less than –1?   [#permalink] 15 May 2017, 03:29
Display posts from previous: Sort by

Is the negative number x less than –1?

  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 | 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®.