Find all School-related info fast with the new School-Specific MBA Forum

It is currently 04 Sep 2015, 00:06
GMAT Club Tests

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

This is easy, but I want to know if you have a method to

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Retired Moderator
User avatar
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1719
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 79

Kudos [?]: 512 [0], given: 109

This is easy, but I want to know if you have a method to [#permalink] New post 01 Sep 2010, 17:13
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

74% (01:48) correct 26% (00:35) wrong based on 34 sessions
This is easy, but I want to know if you have a method to assign values in the case of clue #2. I want to answer this type of questions as fast as I can. Thanks!

Is x>y?

(1) x = y + 2
(2) x/2 = y -1
[Reveal] Spoiler: OA

_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings

Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 29209
Followers: 4751

Kudos [?]: 50309 [1] , given: 7544

Re: Is x > y? [#permalink] New post 01 Sep 2010, 17:35
1
This post received
KUDOS
Expert's post
metallicafan wrote:
This is easy, but I want to know if you have a method to assign values in the case of clue #2. I want to answer this type of questions as fast as I can. Thanks!

Is x>y?

(1) x = y + 2
(2) x/2 = y -1


Is \(x>y\)?

(1) \(x=y+2\) --> if you just read what is written you'll get "\(x\) is 2 more than \(y\)", so \(x\) is more than \(y\). Sufficient.

Or you can substitute \(x\) in the question: is \(x>y\)? --> question becomes: is \(y+2>y\)? is \(2>0\)? YES, 2 is more than 0. So the answer to the question is YES. Sufficient.

(2) \(\frac{x}{2}=y-1\) --> \(x=2y-2\) --> substitute \(x\) in the question: is \(x>y\)? --> question becomes: is \(2y-2>y\)? is \(y>2\)? We don't know that, hence this statement is not sufficient.

As for number plugging:
On DS questions when plugging numbers, goal is to prove that the statement is not sufficient. So we should try to get a YES answer with one chosen number(s) and a NO with another.

Try \(x=0\) then \(y=1\) and the answer to the question is NO;
Increase \(x\): try \(x=10\) then \(y=6\) and the answer to the question is YES.

Two different answer, hence not sufficient.

Answer: A.

Hope it helps.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis ; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) ; 12. 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?
25 extra-hard Quant Tests

GMAT Club Premium Membership - big benefits and savings

Retired Moderator
User avatar
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1719
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 79

Kudos [?]: 512 [0], given: 109

Re: Is x > y? [#permalink] New post 01 Sep 2010, 17:42
Bunuel wrote:
metallicafan wrote:
This is easy, but I want to know if you have a method to assign values in the case of clue #2. I want to answer this type of questions as fast as I can. Thanks!

Is x>y?

(1) x = y + 2
(2) x/2 = y -1


Is \(x>y\)?

(1) \(x=y+2\) --> if you just read what is written you'll get "\(x\) is 2 more than \(y\)", so \(x\) is more than \(y\). Sufficient.

Or you can substitute \(x\) in the question: is \(x>y\)? --> question becomes: is \(y+2>y\)? is \(2>0\)? YES, 2 is more than 0. So the answer to the question is YES. Sufficient.

(2) \(\frac{x}{2}=y-1\) --> \(x=2y-2\) --> substitute \(x\) in the question: is \(x>y\)? --> question becomes: is \(2y-2>y\)? is \(y>2\)? We don't know that, hence this statement is not sufficient.

As for number plugging:
On DS questions when plugging numbers, goal is to prove that the statement is not sufficient. So we should try to get a YES answer with one chosen number(s) and a NO with another.

Try \(x=0\) then \(y=1\) and the answer to the question is NO;
Increase \(x\): try \(x=10\) then \(y=6\) and the answer to the question is YES.

Two different answer, hence not sufficient.

Answer: A.

Hope it helps.


Thanks Bunuel!, you are the real Master!
_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings

Manager
Manager
avatar
Joined: 16 Mar 2010
Posts: 189
Followers: 2

Kudos [?]: 79 [0], given: 9

Re: Is x > y? [#permalink] New post 02 Sep 2010, 00:06
substitution is best in this case
Re: Is x > y?   [#permalink] 02 Sep 2010, 00:06
    Similar topics Author Replies Last post
Similar
Topics:
1 Does anyone know how A is also correct here? I know that thesfactor 4 07 May 2011, 13:04
1 Experts publish their posts in the topic If you have done a variety of questions, you have come VeritasPrepKarishma 14 03 Mar 2011, 19:45
If |a-b|=c ,what is the value of a? 1. b=2 2.c=7 I know this rajnisht 3 19 Dec 2010, 22:45
Percents - Easy jscott319 2 11 Dec 2010, 19:03
Experts publish their posts in the topic Multplying by a negative and inequalities Jinglander 4 03 Aug 2010, 18:34
Display posts from previous: Sort by

This is easy, but I want to know if you have a method to

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

GMAT Club MBA Forum Home| About| Privacy Policy| 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®.