Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Jun 3008:00 AM PDT
-11:59 PM PDT
Join us June 30th for 2 weeks of GMAT questions (just 8 per day) to help with your prep and to compete with your fellow GMAT Clubbers for a chance to win a prize fund of $30,000 for you and your team-mates!
Jul 0901:00 PM EDT
-02:00 PM EDT
More Target Test Prep students are earning 100th percentile GMAT scores. Don’t settle for less when the Target Test Prep course gives you everything you need to score high on the GMAT. Start your 5-day free trial today.- Jul 10
11:00 AM PDT
-11:00 AM PDT
In our conversation, Kishore talks about how strategically he used data analytics to identify high impact areas to focus on as well as his early morning study routine (3 AM prep!) that optimized his GMAT preparation. 
Jul 1206:30 AM PDT
-08:30 AM PDT
Join our webinar to master GMAT RC Main Point Questions! Learn effective strategies to decipher passage themes and purposes. Senior Verbal Expert- Sunita Singhvi will equip you with tools to navigate complexities and avoid common traps set by the GMAT.
Jul 1211:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.
Jul 1311:00 AM EDT
-12:30 PM EDT
Looking for your GMAT motivation to break through the score plateau? Pragati improved her score by massive 160 points with strategic guidance and hard-work! Find out how personalized mentorship and a strong mindset can turn GMAT struggles into success.
Jul 1508:00 PM PDT
-09:00 PM PDT
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
Jul 1611:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors.
05 Apr 2012, 13:25
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
87% (00:44) correct
13%
(01:24)
wrong
based on 289
sessions
History
Date
Time
Result
Not Attempted Yet
If x and y are positive, what is the value of x-y?
(1) (x^2 - y^2)/ (x + y) = 4
(2) x + y = 7
(1) (x^2 - y^2)/ (x + y) = 4
(2) x + y = 7
05 Apr 2012, 13:41
Kudos
Bookmarks
If x and y are positive, what is the value of x-y?
(1) (x^2 - y^2)/ (x + y) = 4 --> \(\frac{(x- y)(x+y)}{x + y}= 4\) --> reduce by \(x+y\): \(x-y=4\). Sufficient.
(2) x + y = 7. Clearly insufficient.
Answer: A.
(1) (x^2 - y^2)/ (x + y) = 4 --> \(\frac{(x- y)(x+y)}{x + y}= 4\) --> reduce by \(x+y\): \(x-y=4\). Sufficient.
(2) x + y = 7. Clearly insufficient.
Answer: A.
General Discussion
30 Apr 2012, 11:22
Kudos
Bookmarks
eybrj2
If x and y are positive, what is the value of x-y?
(1) (x^2 - y^2)/ (x + y) = 4
(2) x + y = 7
(1) (x^2 - y^2)/ (x + y) = 4
(2) x + y = 7
Ans Exp:
so we are required to find the difference between x and y
Statement 1: (x^2 - y^2)/ (x + y) = 4
by observing keenly we can get that the numerator i.e (x^2 - y^2) is in (a^2)-(b^2) so this can be written as
(a +b)(a-b) so
(x^2 - y^2)/ (x + y) = 4 => (x+y)(x-y)/(x+y)=4 =>by cancelling x+y in both numerator and denominator we are left with x-y=4 which is required ,so statement 1 is sufficient to answer the question .
Statement 2: x+y=7 as the question wanted us to solve for x-y we do nothing with x+y so statement 2 is insufficient
Answer = A.
