NEW HERE? LEARN MORE
closeclose
Last visit was: 28 Apr 2024, 09:40 It is currently 28 Apr 2024, 09:40
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k

SORT BY:
Date
Kudos
Tags:
Poor Qualityx      
Find Similar Topics 
Show Tags
Hide Tags
User avatar
S
btrg
Manager
Manager
Joined: 31 Oct 2018
Posts: 64
Own Kudos [?]: 226 [4]
Given Kudos: 173
Location: India
Send PM
Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k [#permalink] New post   Updated on: 16 Apr 2019, 20:25
2
Kudos
2
Bookmarks
00:00
A
B
C
D
E

Difficulty:

95% (hard)

Question Stats:

30% (02:16) correct 70% (02:10) wrong based on 102 sessions
Hide Show timer Statistics
Is k < 0?

(1) |2k + 5| = 3k + 1
(2) |k - 2| = 7k

This Question is Locked Due to Poor Quality
Hi there,
The question you've reached has been archived due to not meeting our community quality standards. No more replies are possible here.
Looking for better-quality questions? Check out the 'Similar Questions' block below for a list of similar but high-quality questions.
Want to join other relevant Problem Solving discussions? Visit our Data Sufficiency (DS) Forum for the most recent and top-quality discussions.
Thank you for understanding, and happy exploring!
ShowHide Answer
Official Answer
D

Originally posted by btrg on 16 Apr 2019, 09:06.
Last edited by chetan2u on 16 Apr 2019, 20:25, edited 1 time in total.
Corrected the OA
User avatar
L
chetan2u
RC & DI Moderator
Joined: 02 Aug 2009
Status:Math and DI Expert
Posts: 11183
Own Kudos [?]: 32012 [4]
Given Kudos: 291
Send PM
Reviews Badge
Re: Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k [#permalink] New post   16 Apr 2019, 20:23
1
Kudos
3
Bookmarks
Expert Reply
Is k < 0?

(1) |2k + 5| = 3k + 1
Two cases..
2k+5=3k+1......k=4
-2k-5=3k+1......5k=-6 or k=-1.2
But substitute these values back in equation to check whether 3k+1\(\geq{0}\)..
3*4+1\(\geq{0}\)...Yes
3*(-1.2)+1\(\geq{0}\)..No
So k is 4, and sufficient

(2) |k - 2| = 7k
7k\(\geq{0}\), so k is not less than 0.
Sufficient

D..
The OA B is wrong, and the question has different possible values of k in each condition, which is never the case in official questions.
avatar
G
abannore
Current Student
Joined: 10 Jun 2018
Posts: 49
Own Kudos [?]: 85 [0]
Given Kudos: 36
Location: India
Schools: Kenan-Flagler '24 (WL) Jones (A)
GMAT 1: 690 Q49 V34
Send PM
Re: Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k [#permalink] New post   01 May 2019, 06:47
Why are we substituting the values and checking if 3k+1>=0?
Why have we considered >=0 to cross-check?
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92975
Own Kudos [?]: 619670 [3]
Given Kudos: 81613
Send PM
CAT Tests Forum Quiz Mode
Re: Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k [#permalink] New post   21 Oct 2019, 10:48
2
Kudos
1
Bookmarks
Expert Reply
btrg wrote:
Is k < 0?

(1) |2k + 5| = 3k + 1
(2) |k - 2| = 7k


This is not a good question. From (1) we have that k = 4 and from (2) that k = 1/4. The statements contradict each other.
User avatar
D
gvij2017
Director
Director
Joined: 09 Aug 2017
Posts: 689
Own Kudos [?]: 416 [0]
Given Kudos: 778
Send PM
Re: Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k [#permalink] New post   21 Oct 2019, 16:14
I think we need to heed the question stem.
Question is asking whether k is negative.

And from both cases, we conclude that k is non-negative.

Here, the value of K doesn't matter because question is not asking for value of k.
Therefore, question is not contentious.

Bunuel wrote:
btrg wrote:
Is k < 0?

(1) |2k + 5| = 3k + 1
(2) |k - 2| = 7k


This is not a good question. From (1) we have that k = 4 and from (2) that k = 1/4. The statements contradict each other.
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92975
Own Kudos [?]: 619670 [0]
Given Kudos: 81613
Send PM
CAT Tests Forum Quiz Mode
Re: Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k [#permalink] New post   21 Oct 2019, 20:38
Expert Reply
gvij2017 wrote:
I think we need to heed the question stem.
Question is asking whether k is negative.

And from both cases, we conclude that k is non-negative.

Here, the value of K doesn't matter because question is not asking for value of k.
Therefore, question is not contentious.

Bunuel wrote:
btrg wrote:
Is k < 0?

(1) |2k + 5| = 3k + 1
(2) |k - 2| = 7k


This is not a good question. From (1) we have that k = 4 and from (2) that k = 1/4. The statements contradict each other.


You are wrong. It does not matter what the question is asking. On the GMAT two statements do not contradict each other.

This Question is Locked Due to Poor Quality
Hi there,
The question you've reached has been archived due to not meeting our community quality standards. No more replies are possible here.
Looking for better-quality questions? Check out the 'Similar Questions' block below for a list of similar but high-quality questions.
Want to join other relevant Problem Solving discussions? Visit our Data Sufficiency (DS) Forum for the most recent and top-quality discussions.
Thank you for understanding, and happy exploring!
GMAT Club Bot
gmatclubot
Re: Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k [#permalink]
21 Oct 2019, 20:38
Moderator:
Bunuel
Math Expert
92974 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions