Last visit was: 15 Dec 2024, 03:49 It is currently 15 Dec 2024, 03:49
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
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 15 Dec 2024
Posts: 97,882
Own Kudos:
685,990
 []
Given Kudos: 88,273
Products:
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 97,882
Kudos: 685,990
 []
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
User avatar
ThatDudeKnows
Joined: 11 May 2022
Last visit: 27 Jun 2024
Posts: 1,078
Own Kudos:
Given Kudos: 79
Expert reply
Posts: 1,078
Kudos: 807
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Solenja
Joined: 23 Sep 2021
Last visit: 16 Jul 2024
Posts: 131
Own Kudos:
Given Kudos: 257
GRE 1: Q163 V157
GRE 1: Q163 V157
Posts: 131
Kudos: 58
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
ThatDudeKnows
Joined: 11 May 2022
Last visit: 27 Jun 2024
Posts: 1,078
Own Kudos:
807
 []
Given Kudos: 79
Expert reply
Posts: 1,078
Kudos: 807
 []
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Solenja
ThatDudeKnows
Bunuel
If three times the circumference of circle P is double the circumference of circle Q, then the diameter of circle Q is how many times the radius of circle P?

A. 6
B. 3
C. 1.5
D. 4/3
E. 2/3

Before we start solving, wouldn't it really suck to know how to get the right answer, do all the math,...and then click the wrong answer because you do diameter:diameter or radius:radius? As soon as I spot that there's a little trap at the end of the question, I flip my computer mouse over. That way, when I go to click an answer, I have a reminder to make sure I took care of the trap.

On to the solution. Let's just make up values that are easy to work with. Make circumference of P = 2pi and circumference of Q = 3pi. Diameter of P = 1 and diameter of Q = 1.5. Radius of P = 0.5.
Diameter Q : Radius P = 1.5:0.5 = 3

Answer choice B.
Can i take larger numbers (say 2 and 8)

You can use whatever numbers you'd like...IF they meet the criteria stated in the question! In this case, we need numbers that make it true that "three times the circumference of circle P is double the circumference of circle Q." Would 2 and 8 meet that criteria?
avatar
MBAHOUSE
avatar
MBA House Admissions Consultant
Joined: 26 May 2022
Last visit: 23 Apr 2024
Posts: 343
Own Kudos:
79
 []
Expert reply
Posts: 343
Kudos: 79
 []
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I did many steps to explain in detail for you, but of course you don’t need to do all these steps during the test, specially in a relatively simple question like that.
Let’s work.
Attachments

532B03EA-C418-4587-8091-7089F12D58B1.jpeg
532B03EA-C418-4587-8091-7089F12D58B1.jpeg [ 272.33 KiB | Viewed 732 times ]

Moderator:
Math Expert
97881 posts