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

It is currently 13 Dec 2018, 01:40

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 in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
  • The winning strategy for 700+ on the GMAT

     December 13, 2018

     December 13, 2018

     08:00 AM PST

     09:00 AM PST

    What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.
  • GMATbuster's Weekly GMAT Quant Quiz, Tomorrow, Saturday at 9 AM PST

     December 14, 2018

     December 14, 2018

     09:00 AM PST

     10:00 AM PST

    10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.

In the xy plane does the point (a, b) lie above the line y=x

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

Hide Tags

Manager
Manager
avatar
Joined: 14 Mar 2010
Posts: 50
In the xy plane does the point (a, b) lie above the line y=x  [#permalink]

Show Tags

New post 24 Apr 2012, 19:59
6
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

61% (01:10) correct 39% (01:16) wrong based on 292 sessions

HideShow timer Statistics

In the xy plane, does the point (a, b) lie above the line y=x?

(1) a=2
(2) b=a+2

_________________

MGMAT CAT MATH http://gmatclub.com/forum/mgmat-cat-math-144609.html
MGMAT SC SUMMARY: http://gmatclub.com/forum/mgmat-sc-summary-144610.html

Manager
Manager
avatar
Status: I will not stop until i realise my goal which is my dream too
Joined: 25 Feb 2010
Posts: 194
Schools: Johnson '15
Re: n the xy plane, does the point(a, b)  [#permalink]

Show Tags

New post 24 Apr 2012, 20:25
1
1
monir6000 wrote:
In the xy plane, does the point(a, b) lie above the line y=x?
(1) a=2
(2) b=a+2


used substitution method

given that y = x

1) a=2, no mention of b

so the point (a,b) can fall either below the line or above the line y=x

so NS .. hence Options A & D are gone.

2) b = a+2
so take any value a, b will be greater than a by 2...

hence this point will always be above the line... Hence B....
_________________

Regards,
Harsha

Note: Give me kudos if my approach is right , else help me understand where i am missing.. I want to bell the GMAT Cat ;)

Satyameva Jayate - Truth alone triumphs

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 51164
Re: In the xy plane does the point (a, b) lie above the line y=x  [#permalink]

Show Tags

New post 24 Apr 2012, 21:08
3
1
In the xy plane, does the point (a, b) lie above the line y=x?

Each point of line y=x has the same x and y coordinates: (-7, -7), (1, 1), (100, 100), ...

(1) a=2. Not sufficient since no info about b

(2) b=a+2 --> since y coordinate of the point is 2 more than its x coordinate than it will lie above the line x=y, consider point (1, 3). Sufficient.
Attachment:
y=x.png
y=x.png [ 12.4 KiB | Viewed 7304 times ]


Answer: B.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | 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

Manager
Manager
avatar
Joined: 14 Mar 2010
Posts: 50
Re: In the xy plane does the point (a, b) lie above the line y=x  [#permalink]

Show Tags

New post 24 Apr 2012, 23:06
Thanks Bunnel & harshavmrg.......
_________________

MGMAT CAT MATH http://gmatclub.com/forum/mgmat-cat-math-144609.html
MGMAT SC SUMMARY: http://gmatclub.com/forum/mgmat-sc-summary-144610.html

Intern
Intern
avatar
Joined: 29 Sep 2014
Posts: 1
Re: In the xy plane does the point (a, b) lie above the line y=x  [#permalink]

Show Tags

New post 21 Sep 2015, 21:46
if the value of a was -4, will answer choice b still be the answer? such that point a will be -4 and b equals -2 (ie -4+2). Am thinking the line will then be under the x=y line
Manager
Manager
avatar
B
Joined: 24 May 2014
Posts: 87
Location: India
GMAT 1: 590 Q39 V32
GRE 1: Q159 V151

GRE 2: Q159 V153
GPA: 2.9
Re: In the xy plane does the point (a, b) lie above the line y=x  [#permalink]

Show Tags

New post 19 Aug 2016, 18:23
Have a query, in the prompt it is mentioned that point lies above the line 'y=x', so only positive values of 'a' to be considered.? Because if negative values are considered then statement 2 won't be sufficient.
Manager
Manager
avatar
B
Joined: 22 Feb 2016
Posts: 91
Location: India
Concentration: Economics, Healthcare
GMAT 1: 690 Q42 V47
GMAT 2: 710 Q47 V39
GPA: 3.57
Re: In the xy plane does the point (a, b) lie above the line y=x  [#permalink]

Show Tags

New post 01 Oct 2016, 21:45
There is a very interesting concept that I have learnt.
Any point above the line x=y will have higher value of y as compared to x and any point below the line x=y will have lower value of y as compared to x so the question generally boiled down to if b>a and statement 2 proved it to be correct
IMO B
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 9142
Premium Member
Re: In the xy plane does the point (a, b) lie above the line y=x  [#permalink]

Show Tags

New post 25 Jul 2018, 12:03
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

GMAT Club Bot
Re: In the xy plane does the point (a, b) lie above the line y=x &nbs [#permalink] 25 Jul 2018, 12:03
Display posts from previous: Sort by

In the xy plane does the point (a, b) lie above the line y=x

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


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.