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 350,000 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:

I saw these on another forum-I think business week. 1. There [#permalink]
16 Sep 2003, 08:26

I saw these on another forum-I think business week.

1. There are 5 English, 3 Spanish and 2 Portuguese books on a shelf. If 2 books are selected without replacement what is the probability that they will be of different languages.

2. What is the greatest prime number 2^100 - 2^96 is evenly divisible by?

Re: Can't figure these out [#permalink]
16 Sep 2003, 08:41

1. There are 5 English, 3 Spanish and 2 Portuguese books on a shelf. If 2 books are selected without replacement what is the probability that they will be of different languages.

Prob that two selected are same
5/10*4/9 + 3/10*2/9 + 2/10 * 1/9 = 14/45

Probability that they are different = 1- 14/45 = 31/45

Answer 31/45

2. What is the greatest prime number 2^100 - 2^96 is evenly divisible by

2^96(2^4 -1 ) = 2^96 *15 = 2^96 * 3 * 5

So the greatest Prime number that can divide the expression is 5

Answer 5

Thanks
Praetorian

Last edited by Praetorian on 16 Sep 2003, 08:46, edited 1 time in total.

safe.txmblr Can business make a difference in the great problems that we face? My own view is nuanced. I think business potentially has a significant role to play...

Still 7 months to go to be at Lausanne. But, as Lausanne has a vacancy rate of 0.1% for rental properties, I booked my rental apartment yesterday for...