BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

[Prep][DS][My mistakes] HSPA posts

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Legendary Member
Posts: 1101
Joined: Fri Jan 28, 2011 7:26 am
Thanked: 47 times
Followed by:13 members
GMAT Score:640

[Prep][DS][My mistakes] HSPA posts

by HSPA » Sun Nov 13, 2011 5:03 am
If r and s are positive integers, is r/s an integer?

1. Every factor of s is also a factor of r
2. Every prime factor of s is also a factor of r

Hi Mitch,
In the above question's option A is r = s in value?
First take: 640 (50M, 27V) - RC needs 300% improvement
Second take: coming soon..
Regards,
HSPA.
Top
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 588
Joined: Sun Oct 16, 2011 9:42 am
Location: New Delhi, India
Thanked: 130 times
Followed by:9 members
GMAT Score:720

by rijul007 » Sun Nov 13, 2011 5:44 am
In the above question's option A is r = s in value?
In A,
r = p*s

where p is an Integer..[/quote]
Top
User avatar
Legendary Member
Posts: 588
Joined: Sun Oct 16, 2011 9:42 am
Location: New Delhi, India
Thanked: 130 times
Followed by:9 members
GMAT Score:720

by rijul007 » Sun Nov 13, 2011 5:46 am
IMO: A
Top
Master | Next Rank: 500 Posts
Posts: 370
Joined: Sat Jun 11, 2011 8:50 pm
Location: Arlington, MA.
Thanked: 27 times
Followed by:2 members

by winniethepooh » Sun Nov 13, 2011 5:49 am
IMO:D

I don't think r needs to be equal to s.
Top
User avatar
Community Manager
Posts: 1060
Joined: Fri May 13, 2011 6:46 am
Location: Utrecht, The Netherlands
Thanked: 318 times
Followed by:52 members

by neelgandham » Sun Nov 13, 2011 6:44 am
IMO A


If r and s are positive integers, is r/s an integer?
1. Every factor of s is also a factor of r
If every factor of s is also a factor of r then r = k * s, where k is an Integer and r/s= k, an Integer. Hence, Sufficient !
2. Every prime factor of s is also a factor of r
e.g.1 s = 2, r = 4 prime factor = 2, r/s is an Integer
e.g.2 s = 8, r = 4 prime factor = 2, r/s is not an Integer

Hence Insufficient!
Anil Gandham
Welcome to BEATtheGMAT | Photography | Getting Started | BTG Community rules | MBA Watch
Check out GMAT Prep Now's online course at https://www.gmatprepnow.com/
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 416
Joined: Tue Aug 30, 2011 2:18 pm
Location: Delhi, India
Thanked: 13 times
Followed by:9 members

by vaibhavgupta » Sun Nov 13, 2011 7:18 am
HSPA wrote:If r and s are positive integers, is r/s an integer?

1. Every factor of s is also a factor of r
2. Every prime factor of s is also a factor of r
+1 for A!

Needed some thought into it! :)
If OA is A, IMO B
If OA is B, IMO C
If OA is C, IMO D
If OA is D, IMO E
If OA is E, IMO A

FML!! :/
Top
Post new topic Post Reply
• Page 1 of 1