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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

If O is the center of the circle above, what fraction of the circular region is shaded?

(A) 1/12 (B) 1/9 (C) 1/6 (D) 1/4 (E) 1/3

150°+150°=300° of the circle is not shaded, hence 360°-300°=60° of the circle is shaded, which is \(\frac{60}{360}=\frac{1}{6}\) of the circular region.

Re: If O is the center of the circle above, what fraction of the [#permalink]

Show Tags

11 Sep 2012, 09:56

1

This post received KUDOS

Bunuel wrote:

Attachment:

Circle.png

If O is the center of the circle above, what fraction of the circular region is shaded?

(A) 1/12 (B) 1/9 (C) 1/6 (D) 1/4 (E) 1/3

Total angle in a circle = 360 degree One of Non-shaded angle = 150 degree Other Non-shaded angle = 150 degree (?) because it is opposite angle Total Non-shaded angle = 150 + 150 = 300 degree So, shaded angle = 360 - 300 = 60 degree

Re: If O is the center of the circle above, what fraction of the [#permalink]

Show Tags

11 Sep 2012, 09:57

1

This post received KUDOS

I would say (C), but it seems such an easy answer. Anyways, here is the explanation: 360-2*150=60 60 degrees is the total of shaded regions, so 60/360 = 1/6. So, please correct me if I went awry.

p.s. where is trick here? those shaded regions opposite to each other do not have equal angles? _________________

Re: If O is the center of the circle above, what fraction of the [#permalink]

Show Tags

12 Sep 2012, 04:37

1

This post received KUDOS

Bunuel wrote:

Attachment:

Circle.png

If O is the center of the circle above, what fraction of the circular region is shaded?

(A) 1/12 (B) 1/9 (C) 1/6 (D) 1/4 (E) 1/3

Since both Lines pass through centers they are alternate angles. Hence shaded degree measure is 360- (150x2)=60

So fraction of circle shaded = 60/360 = 1/6.

Hence Answer Choice C. _________________

Regards SD ----------------------------- Press Kudos if you like my post. Debrief 610-540-580-710(Long Journey): http://gmatclub.com/forum/from-600-540-580-710-finally-achieved-in-4th-attempt-142456.html

Re: If O is the center of the circle above, what fraction of the [#permalink]

Show Tags

12 Sep 2012, 12:57

1

This post received KUDOS

Fraction of Shaded region = Angle made at the center by shaded region/ Angle at center of a circle = (360-150*2)/360 = 60/360 = 1/6 Answer C _________________

If you like my Question/Explanation or the contribution, Kindly appreciate by pressing KUDOS. Kudos always maximizes GMATCLUB worth-Game Theory

If you have any question regarding my post, kindly pm me or else I won't be able to reply

If O is the center of the circle above, what fraction of the circular region is shaded?

(A) 1/12 (B) 1/9 (C) 1/6 (D) 1/4 (E) 1/3

150°+150°=300° of the circle is not shaded, hence 360°-300°=60° of the circle is shaded, which is \(\frac{60}{360}=\frac{1}{6}\) of the circular region.

Answer: C.

Kudos points given to everyone with correct solution. Let me know if I missed someone. _________________

Re: If O is the center of the circle above, what fraction of the [#permalink]

Show Tags

04 Feb 2016, 12:56

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________

This is the kickoff for my 2016-2017 application season. After a summer of introspect and debate I have decided to relaunch my b-school application journey. Why would anyone want...

Check out this awesome article about Anderson on Poets Quants, http://poetsandquants.com/2015/01/02/uclas-anderson-school-morphs-into-a-friendly-tech-hub/ . Anderson is a great place! Sorry for the lack of updates recently. I...

According to the Nebula Award categories, a novel must be over 40,000 words. In the past year I have written assignments for 22 classes totaling just under 65...