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.
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Nov 2510:00 AM EST
-11:00 AM EST
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.
26 Jan 2010, 16:16
Kudos
Bookmarks
What's the value of a^4 - b^4 ?
1. a^2 - b^2 = 16
2. a + b = 8
Appreciate it if somebody can help me in solving the above DS problem. An explanation will also be appreciated.
Thanks
1. a^2 - b^2 = 16
2. a + b = 8
Appreciate it if somebody can help me in solving the above DS problem. An explanation will also be appreciated.
Thanks
Archived Topic
Hi there,
Archived GMAT Club Tests question - no more replies possible.
Where to now? Try our up-to-date Free Adaptive GMAT Club Tests
for the latest questions.
Still interested? Check out the "Best Topics" block below for better discussion and related questions.
Thank you for understanding, and happy exploring!
26 Jan 2010, 16:26
Kudos
Bookmarks
amadi4040
IMO C.
\(a^4 - b^4 = (a^2 - b^2)*(a^2 + b^2)\)
1. \(a^2-b^2 = 16\). Clearly insufficient as we do not know the value of \(a^2+b^2\).
2. \(a+b = 8\). Again insufficient as it does not provide any information about value of \(a-b\).
Together 1 and 2 are sufficient. How???
\(a^2-b^2 = 16\)
\((a-b)*(a+b) = 16\)
\(a-b = 2\) As we know that \(a+b = 8\). Now we can find the value of \(a & b\).
Thus answer is C.
Archived Topic
Hi there,
Archived GMAT Club Tests question - no more replies possible.
Where to now? Try our up-to-date Free Adaptive GMAT Club Tests
for the latest questions.
Still interested? Check out the "Best Topics" block above for better discussion and related questions.
Thank you for understanding, and happy exploring!
Moderator:
