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

It is currently 13 Oct 2019, 13:37

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

Is integer y > 0?

  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: 58335
Is integer y > 0?  [#permalink]

Show Tags

New post 27 Jul 2016, 01:43
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

68% (01:16) correct 32% (01:45) wrong based on 195 sessions

HideShow timer Statistics

Intern
Intern
avatar
Joined: 07 Jun 2015
Posts: 10
Re: Is integer y > 0?  [#permalink]

Show Tags

New post 27 Jul 2016, 04:50
It's A, since y should be less than 0 for the -(2+y)>0.

For ST2 ycan take either +ve or -ve y.

Posted from my mobile device
Board of Directors
User avatar
V
Status: Stepping into my 10 years long dream
Joined: 18 Jul 2015
Posts: 3584
Reviews Badge
Re: Is integer y > 0?  [#permalink]

Show Tags

New post 27 Jul 2016, 05:18
Bunuel wrote:
Is integer y > 0?

(1) –(2 + y) > 0

(2) (2 + y)^2 > 0


Statement 1:

–(2 + y) > 0
=> 2+y < 0
=> y<-2. Hence, A is sufficient.

Statement 2: whether y is +ve or -ve, this statement will always be positive. Hence , INSUFFICIENT.
_________________
My LinkedIn abhimahna.
My GMAT Story: From V21 to V40
My MBA Journey: My 10 years long MBA Dream
My Secret Hacks: Best way to use GMATClub | Importance of an Error Log!
Verbal Resources: All SC Resources at one place | All CR Resources at one place
Blog: Subscribe to Question of the Day Blog
GMAT Club Inbuilt Error Log Functionality - View More.
New Visa Forum - Ask all your Visa Related Questions - here.
New! Best Reply Functionality on GMAT Club!
Find a bug in the new email templates and get rewarded with 2 weeks of GMATClub Tests for free
Check our new About Us Page here.
CEO
CEO
User avatar
V
Joined: 12 Sep 2015
Posts: 3990
Location: Canada
Re: Is integer y > 0?  [#permalink]

Show Tags

New post 27 Jul 2016, 07:44
2
Top Contributor
1
Bunuel wrote:
Is integer y > 0?

(1) –(2 + y) > 0

(2) (2 + y)² > 0


Target question: Is integer y GREATER THAN 0?

Statement 1: –(2 + y) > 0
Expand to get: –2 - y > 0
Add y to both sides to get: -2 > y
If y is LESS than -2, we can be certain that y is NEGATIVE.
This means we can conclude that y is definitely not greater than 0
Since we can answer the target question with certainty, statement 1 is SUFFICIENT

Statement 2: (2 + y)² > 0
Hmmm, the square of some value is ALWAYS greater than or equal to zero. So, this statement doesn't seem to tell us much.
Since this statement doesn't FEEL sufficient, I'll TEST some values.
There are several values of y that satisfy statement 2. Here are two:
Case a: y = 1. Here, (2 + y)² = (2 + 1)² = 9, and 9 > 0. In this case, y is GREATER THAN 0
Case b: y = -1. Here, (2 + y)² = (2 + -1)² = 1, and 1 > 0. In this case, y is NOT greater than 0
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT

Answer =

Aside: For more on this idea of plugging in values when a statement doesn't feel sufficient, you can read my article: http://www.gmatprepnow.com/articles/dat ... lug-values

RELATED VIDEOS




_________________
Test confidently with gmatprepnow.com
Image
Current Student
User avatar
Joined: 18 Oct 2014
Posts: 807
Location: United States
GMAT 1: 660 Q49 V31
GPA: 3.98
GMAT ToolKit User
Re: Is integer y > 0?  [#permalink]

Show Tags

New post 27 Jul 2016, 15:43
2
Bunuel wrote:
Is integer y > 0?

(1) –(2 + y) > 0

(2) (2 + y)^2 > 0


(1) –(2 + y) > 0
2+y <0
y<-2. This means that y is not >0

Sufficient.

(2) (2 + y)^2 > 0
(2 + y) > 0
y>-2

so y can be -1, 0 , 1. Not sufficient.

A is the answer
_________________
I welcome critical analysis of my post!! That will help me reach 700+
Intern
Intern
avatar
B
Joined: 08 Aug 2018
Posts: 40
Location: India
GMAT 1: 720 Q49 V40
GPA: 4
WE: Engineering (Energy and Utilities)
Re: Is integer y > 0?  [#permalink]

Show Tags

New post 13 Oct 2018, 20:52
Divyadisha wrote:
Bunuel wrote:
Is integer y > 0?

(1) –(2 + y) > 0

(2) (2 + y)^2 > 0


(1) –(2 + y) > 0
2+y <0
y<-2. This means that y is not >0

Sufficient.

(2) (2 + y)^2 > 0
(2 + y) > 0
y>-2

so y can be -1, 0 , 1. Not sufficient.

A is the answer


For statement 2, we have (2+y)^2 > 0 and you have tested for the positive value of (2+y). Theoretically, do we need to test for (2+y)<0 also?
GMAT Club Bot
Re: Is integer y > 0?   [#permalink] 13 Oct 2018, 20:52
Display posts from previous: Sort by

Is integer y > 0?

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





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