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:

[quote="jinino"]I do not get either Bhimsen or Banerjeea_98's approach. Can someone show me the light and explain a bit more in details?

Thanks!

:oops:[/quote]

jinino, 5^40+5^37 can be written as 5^37(5^3+1) which again means 5^37(126). There is only 1 prime factor in 5^37 i.e. 5 and there are 3 prime factors for 126 (2x7x3x3) i.e. 3, 7, 2. Hence ans is 4. Hope this helps.

Thanks for your input. I got it now, but I still have one more question. We know 5^37 has only one prime number, which is 5. What do we do if the question is 6^40+6^37? How do we figure out the prime number for 6^37?

Type of Visa: You will be applying for a Non-Immigrant F-1 (Student) US Visa. Applying for a Visa: Create an account on: https://cgifederal.secure.force.com/?language=Englishcountry=India Complete...