Last visit was: 12 May 2026, 19:57 It is currently 12 May 2026, 19:57
Close
GMAT Club Daily Prep
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.
Close
Request Expert Reply
Confirm Cancel
User avatar
sacmanitin
Joined: 05 Jun 2009
Last visit: 29 Feb 2016
Posts: 51
Own Kudos:
Given Kudos: 4
Posts: 51
Kudos: 2,315
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
chetan2u
User avatar
GMAT Expert
Joined: 02 Aug 2009
Last visit: 11 May 2026
Posts: 11,236
Own Kudos:
Given Kudos: 336
Status:Math and DI Expert
Location: India
Concentration: Human Resources, General Management
GMAT Focus 1: 735 Q90 V89 DI81
Products:
Expert
Expert reply
GMAT Focus 1: 735 Q90 V89 DI81
Posts: 11,236
Kudos: 45,168
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
sacmanitin
Joined: 05 Jun 2009
Last visit: 29 Feb 2016
Posts: 51
Own Kudos:
Given Kudos: 4
Posts: 51
Kudos: 2,315
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
IanStewart
User avatar
GMAT Tutor
Joined: 24 Jun 2008
Last visit: 08 May 2026
Posts: 4,143
Own Kudos:
Given Kudos: 98
Expert
Expert reply
Posts: 4,143
Kudos: 11,315
Kudos
Add Kudos
Bookmarks
Bookmark this Post
sacmanitin
The positive integer y is less than 20 and the connection between y and 6 is equal to 1:1 .How many possible values of y are there ?

A) 7
B) 8
C) 9
D) 10
E) 11

please provide the explanation .

No real GMAT question would ever expect you to know what the 'connection' between two numbers means; if that concept appeared in a question, 'connection' would be defined within the question. In any case, the connection of x and y is 1/GCD(x,y). So if the connection between two numbers is 1, their GCD (Greatest Common Divisor) is 1. The question is thus asking us to count how many numbers less than 20 have no divisor (besides 1) in common with 6. There are other ways to do this, but it's easy enough to list them:

1, 5, 7, 11, 13, 17, 19

So the answer is 7.



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Moderator:
Math Expert
110299 posts