prime factor

Expert replies

colakumarfanta: Senior | Next Rank: 100 Posts; Posts: 49; Joined: Mon May 03, 2010 2:55 am; Thanked: 1 times

by colakumarfanta » Wed May 19, 2010 11:13 pm

Some prime factors of 455 are prime factors of n. Only one prime factor of 455 is not a prime factor of n. What is the greatest of 455 / n?
options are 5,7,11,13,15

OA 13

Like this post

Source: Beat The GMAT — Problem Solving | Wed May 19, 2010 11:13 pm

liferocks: Legendary Member; Posts: 576; Joined: Sat Mar 13, 2010 8:31 pmFollowed by: 1 member; Thanked: 97 times

by liferocks » Thu May 20, 2010 12:22 am

455=5*7*13

So greatest 455/n is 13
And option D

"If you don't know where you are going, any road will get you there."
Lewis Carroll

Like this post

gmatmachoman: Legendary Member; Posts: 2326; Joined: Mon Jul 28, 2008 3:54 amFollowed by: 2 members; Thanked: 173 times; GMAT Score:710

by gmatmachoman » Thu May 20, 2010 12:27 am

liferocks wrote:455=5*7*13

So greatest 455/n is 13
And option D

If they would have asked smallest integer, then:

n= 13* 7

455/(13*7)

13*7*5/(13*7)

=5

Small work ard....!!!

R&D on GMAT algorithm:

https://www.beatthegmat.com/r-d-on-gmat- ... tml#305739

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

559 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review