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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Since Statement 1 basically says 5^k/5>3000 which means
(5^k/5) value can be anything from 3001 to infinity as k can take any value not neccessarly an integer value.

From Statement II we get K=4 Hence answer is 4

VJ

Last edited by vijay2001 on 25 Apr 2007, 10:27, edited 3 times in total.

Vijay, your explanation is still not clear. I am also finding it difficult to believe that if (5^k)/5 > 3000, then that's not sufficient to say that 5^k can, in any case, be less than 1000

Let say k=0.999 so k-1= -0.0001 => 1/5^0.0001, which will be a very big number possibilly greater than 3000. Which satisfies the condition (5^(k-1))>3000 but will not satisfy that that 5^k >1000

The first thing I noticed when I finished this problem is that stmt 1 and stmt 2 contradict each other. Stmt one clearly comes out to 5^k>15000, but stmt 2 clearly comes out to 5^k=625. You can't have 5^k both greater than 3000 AND less than 1000.

Anyway, I'm confused by the reasoning for B as well, although vijay's example helps.