It is currently 28 Jun 2017, 12:19
Search
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
Unanswered

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 Workbook Learn more
Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar
CLICK HERE TO HIDE/SHOW EVENTS

Is x less than y? (1) x-y+1<0 (2) x-y-1<0

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
  Sort by Date Sort by Kudos  
Search for:
 
Print view
First unread post
Author Message
TAGS:

Hide Tags
Manager
Manager
avatar
Joined: 10 Feb 2011
Posts: 114
Is x less than y? (1) x-y+1<0 (2) x-y-1<0 [#permalink]

Show Tags

New post 26 Feb 2011, 16:40
3
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

63% (01:55) correct 37% (01:03) wrong based on 164 sessions

HideShow timer Statistics

Is x less than y?

(1) x-y+1<0
(2) x-y-1<0
[Reveal] Spoiler: OA

Last edited by Bunuel on 07 Aug 2012, 00:30, edited 1 time in total.
Edited the question and added the OA.
Expert Post
1 KUDOS received
Math Expert
User avatar
D
Joined: 02 Sep 2009
Posts: 39751
Premium Member CAT Tests
Top Member of the Month
Re: Is x less than y? (1) x-y+1<0 (2) x-y-1<0 [#permalink]

Show Tags

New post 26 Feb 2011, 16:47
1
This post received
KUDOS
Expert's post
Is x less than y?

Is \(x<y\)? --> is \(x-y<0\)?

(1) x-y+1<0 --> \(x-y<-1\). Sufficient.
(2) x-y-1<0 --> \(x-y<1\). Not sufficient.

Answer: A.
_________________

New to the Math Forum?
Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Senior Manager
Senior Manager
User avatar
Status: Can't give up
Joined: 20 Dec 2009
Posts: 311
Re: Is x less than y? (1) x-y+1<0 (2) x-y-1<0 [#permalink]

Show Tags

New post 28 Feb 2011, 18:32
yes A it is

1.) x-y<-1 This is satisfied when x<y

2.) x-y<+1 Not sufficient

example x=1.5 and y=1; 1.5-1 < 1
x = - 2 and y= -1; -2 - (-1) < 1

A it is.
Manager
Manager
avatar
Joined: 05 Jul 2012
Posts: 78
Location: India
Concentration: Finance, Strategy
GMAT Date: 09-30-2012
GPA: 3.08
WE: Engineering (Energy and Utilities)
Re: Can someone help on a tricky DS question on Inequalities [#permalink]

Show Tags

New post 06 Aug 2012, 19:08
gagan_g2k wrote:
Is x less than y?
(1) x-y+1<0
(2) x-y-1<0

The official answer is a but as per my solution it should be d.


That's a very easy trap to fall for, I to fell for it.
Added the two inequalities and got x-y <0 and condluded both are necessary
But if you look at x-y +1 < 0 this means that x+y < -1
which means that X-Y < 0 as -1 < 0 , so we can get the answer from one only.

Now looking at 2) X-Y -1< 0 this means that x-y < 1 which doesn,t clearly mean that x<y as something less than 1 can be positive and negative both.

So A is the answer.
Damn i need more practice !
Director
Director
User avatar
Joined: 22 Mar 2011
Posts: 612
WE: Science (Education)
Re: Can someone help on a tricky DS question on Inequalities [#permalink]

Show Tags

New post 06 Aug 2012, 22:26
gagan_g2k wrote:
Is x less than y?
(1) x-y+1<0
(2) x-y-1<0

The official answer is a but as per my solution it should be d.


(1) \(x-y+1<0\) implies \(x-y<-1<0\), which means \(x-y<0\) or \(x<y\).
Hence sufficient.

(2) Take \(x = y = 0\) for which obviously x is not less than y, but (2) holds. For x = 0 and y = 1, (2) still holds, but now x < y.
Not sufficient.

Answer A.
_________________

PhD in Applied Mathematics
Love GMAT Quant questions and running.

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 16024
Premium Member
Re: Is x less than y? (1) x-y+1<0 (2) x-y-1<0 [#permalink]

Show Tags

New post 21 Aug 2015, 12:31
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 Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Manager
Manager
User avatar
Joined: 14 Jun 2012
Posts: 123
Concentration: International Business
GMAT 1: 560 Q36 V31
GMAT 2: 580 Q39 V31
GMAT 3: 630 Q41 V35
GPA: 4
Reviews Badge CAT Tests
Is x>y? [#permalink]

Show Tags

New post 15 Jul 2016, 01:23
Is x>y?

Statement 1: x-y-1>0

Statement 2: x-y+1>0
Director
Director
avatar
S
Joined: 26 Nov 2012
Posts: 576
Premium Member CAT Tests
Re: Is x>y? [#permalink]

Show Tags

New post 15 Jul 2016, 01:51
Silviax wrote:
Is x>y?

Statement 1: x-y-1>0

Statement 2: x-y+1>0



Given x>y

Then we need to find x-y > 0 ?

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

Stat 2: x-y + 1 > 0.
=> x-y > -1... Insufficient ( Since we need to seek x-y > 0 )

Thus A is correct answer.
Manager
Manager
User avatar
Joined: 14 Jun 2012
Posts: 123
Concentration: International Business
GMAT 1: 560 Q36 V31
GMAT 2: 580 Q39 V31
GMAT 3: 630 Q41 V35
GPA: 4
Reviews Badge CAT Tests
Re: Is x>y? [#permalink]

Show Tags

New post 15 Jul 2016, 02:01
The way you explained makes a lot more sense than the official explanation of Magoosh.

I can now see that statement 1 is sufficient by itself.
Thanks!
Intern
Intern
avatar
Joined: 14 Jul 2016
Posts: 4
CAT Tests
Re: Is x>y? [#permalink]

Show Tags

New post 15 Jul 2016, 02:10
Perfect solution given....

Sent from my A0001 using GMAT Club Forum mobile app
Expert Post
Math Expert
User avatar
D
Joined: 02 Sep 2009
Posts: 39751
Premium Member CAT Tests
Top Member of the Month
Re: Is x less than y? (1) x-y+1<0 (2) x-y-1<0 [#permalink]

Show Tags

New post 15 Jul 2016, 02:18
Expert's post
Silviax wrote:
Is x>y?

Statement 1: x-y-1>0

Statement 2: x-y+1>0


Merging similar topics. Please refer to the solutions above.
_________________

New to the Math Forum?
Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Re: Is x less than y? (1) x-y+1<0 (2) x-y-1<0   [#permalink] 15 Jul 2016, 02:18
Print view
First unread post
    Similar topics Author Replies Last post
Similar
Topics:
 3 Experts publish their posts in the topic Is x < y ? (1) x^2 - y^2 < 0 (2) -x - y < 0 LamaSalah 6 05 Mar 2017, 04:49
27 Experts publish their posts in the topic Is x-y+1 greater than x+y-1 ? Michmax3 24 06 Dec 2016, 19:57
Is x^2 < x-|y| ? 1) y>x 2) x<0 pranit 3 31 Aug 2011, 00:45
Is x-y+1 greater than x+y-1? 1) x>0 2) y<0 Chetangupta 10 04 Jun 2011, 19:21
Is x-y+1 greater than x+y-1 ? (1) x > 0 (2) y < 0 jpr200012 2 18 Aug 2010, 14:10
Display posts from previous: Sort by

Is x less than y? (1) x-y+1<0 (2) x-y-1<0

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

Moderators: msk0657, abhimahna, Bunuel, Engr2012, Vyshak, VeritasPrepKarishma, Skywalker18, mikemcgarry, Abhishek009

Search for:


cron

GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions