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.

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:

If N is an odd integer between 2 and 30, how many distinct prime factors does it have?

3 is not a factor of N 5 is not a factor of N

Answer : A

stat1: any number N b/w 2 & 30 that is not a multiple of 3 has only one prime factor. suff

stat2: if N= 3 then 1 prime factor; if N=21 then 2 prime factors. insuff

For... St A... I first thought u missed 25... everything else was a prime number... then realized 5*5 still means only one prime factor and 25 is not a prime factor.

I made the mistake of selecting C then realized that the only # that is a multiple of 5 is 15 and 25. 15 has 3 as a multiple so we can eliminate it and 25 has only 5 as a factor.

I made the mistake of selecting C then realized that the only # that is a multiple of 5 is 15 and 25. 15 has 3 as a multiple so we can eliminate it and 25 has only 5 as a factor.