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

 It is currently 18 Jun 2019, 18:05

### 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

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

# Is x+y > 0?

Author Message
TAGS:

### Hide Tags

Director
Joined: 06 Jan 2015
Posts: 646
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE: Information Technology (Computer Software)

### Show Tags

26 Jul 2016, 07:07
2
2
00:00

Difficulty:

5% (low)

Question Stats:

89% (00:42) correct 11% (01:18) wrong based on 146 sessions

### HideShow timer Statistics

Is x+y > 0?

(1) x > y
(2) x + y -1 >0

_________________
आत्मनॊ मोक्षार्थम् जगद्धिताय च

Resource: GMATPrep RCs With Solution
Retired Moderator
Joined: 26 Nov 2012
Posts: 587
Re: Is x+y > 0?  [#permalink]

### Show Tags

26 Jul 2016, 07:34
NandishSS wrote:
Is x+y > 0?

(1) x > y
(2) x + y -1 >0

Stat 1: X > Y...

Here X and Y can be positive or negative.

3 > 1 => 4+1 > 0
or -1 > -2 => -3 < 0. Two different answer.. Insufficient.

Stat 2 : x + y -1 >0 => x + y > 1. Sufficient..

CEO
Joined: 12 Sep 2015
Posts: 3783
Re: Is x+y > 0?  [#permalink]

### Show Tags

26 Jul 2016, 10:55
Top Contributor
NandishSS wrote:
Is x+y > 0?

(1) x > y
(2) x + y -1 >0

Target question: Is x+y > 0?

Statement 1:x > y
This statement doesn't FEEL sufficient, so I'll TEST some values.
There are several values of x and y that satisfy statement 1. Here are two:
Case a: x = 1 and y = 0, in which case x + y = 1 + 0 = 1. Here, x + y > 0
Case b: x = 0 and y = -1, in which case x + y = 0 + (-1) = -1. Here, x + y < 0
Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT

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

Statement 2: x + y -1 >0
Add 1 to both sides of the inequality to get: x + y > 1
Since we also know that 1 > 0, we can write: x + y > 1 > 0
At this point, we can see that x + y > 0
Since we can answer the target question with certainty, statement 2 is SUFFICIENT

RELATED VIDEOS

_________________
Test confidently with gmatprepnow.com
Director
Joined: 20 Feb 2015
Posts: 791
Concentration: Strategy, General Management
Re: Is x+y > 0?  [#permalink]

### Show Tags

27 Jul 2016, 04:25
NandishSS wrote:
Is x+y > 0?

(1) x > y
(2) x + y -1 >0

(1) x > y

if x and y both are +ve no then x+y > 0
if x = -3 and y = -4
x+y < 0

Insufficient

(2) x + y -1 > 0
or
x+y > 1

sufficient
CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2942
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Re: Is x+y > 0?  [#permalink]

### Show Tags

16 Sep 2018, 05:49
NandishSS wrote:
Is x+y > 0?

(1) x > y
(2) x + y -1 >0

Question: Is x+y > 0?

Statement 1: x > y
Case 1: x = 2, y = -3 and x+y < 0
Case 2: x = 2, y = -1 and x+y < 0
NOT SUFFICIENT

Statement 2: x+y > 1
i.e. x+y is definitely greater than 0
SUFFICIENT

_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
Re: Is x+y > 0?   [#permalink] 16 Sep 2018, 05:49
Display posts from previous: Sort by