Integer

Expert replies

deepoe: Master | Next Rank: 500 Posts; Posts: 151; Joined: Wed Feb 11, 2009 2:45 am; Thanked: 3 times

by deepoe » Sun Nov 29, 2009 2:48 am

If p is an integer, is ( p/ 18 ) an integer?

1. ( 5p / 18 ) is an integer.
2. ( 6p / 18 ) is an integer.

I don't undestand why statement 1 is sufficient and 2 not?

Like this post

Source: Beat The GMAT — Data Sufficiency | Sun Nov 29, 2009 2:48 am

thephoenix: Legendary Member; Posts: 1560; Joined: Tue Nov 17, 2009 2:38 amFollowed by: 5 members; Thanked: 137 times

by thephoenix » Sun Nov 29, 2009 7:27 am

S1 is suff and S2 is not for the following reasons

S1) if its true then p can be anything------->18,36.....multiple of 18

for all the value mentioned above p/18 is an int

S) =p/3 and it can be int for all p=3,6,9,12,15,18,......multiple of 3

and as we can see from s2 that if p=3 s2 is true but the p/18 is not an int
and for p=18 bth the s2 is true and p/18 is int
two possibilties and hence insuff..

HTH

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 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