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 350,000 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 you want my advice, Peter," he said at last, "you've made a mistake already. By asking me. By asking anyone. Never ask people. Not about your work. Don't you know what you want? How can you stand it, not to know?" Ayn Rand

Re: GMAT Prep 2 Quadrilateral [#permalink]
01 Nov 2009, 12:19

4

This post received KUDOS

Expert's post

1

This post was BOOKMARKED

Is the measure of one of the interior angles of quadrilateral ABCD equal to 60? (1) Two of the interior angles of ABCD are right angles. (2) The degree measure of angle ABC is twice the degree measure of angle BCD.

Sum of inner angels of quadrilateral is 360 degrees. (Sum of inner angles of polygon=180*(n-2), where n is # of sides) (1) Angles can be 90+90 + any combination of two angels totaling 180. Not sufficient. (2) <ABC=2<BCD. Not sufficient

(1)+(2) Angles can be 90+90+45+135 Or 90+90+60+120 Not sufficient.

Re: GMAT Prep 2 Quadrilateral [#permalink]
01 Nov 2009, 12:42

Thanks, seems like a very easy prob. _________________

Trying to make CR and RC my strong points

"If you want my advice, Peter," he said at last, "you've made a mistake already. By asking me. By asking anyone. Never ask people. Not about your work. Don't you know what you want? How can you stand it, not to know?" Ayn Rand

Is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees? 1) Two of the interior angles of ABCD are 90 degrees 2) The degree measure of angle ABC is twice the degree measure of angle BCD

Pls discuss answers.

What's your doubt?

1. Insufficient

2. Insufficient

1+2 We don't know whether the sum of BCD & ABC equals 180. Hence the combination of the two statements can't necessarily give the value of the angle. _________________

Hit kudos if my post helps you. You may send me a PM if you have any doubts about my solution or GMAT problems in general.

Is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees? 1) Two of the interior angles of ABCD are 90 degrees 2) The degree measure of angle ABC is twice the degree measure of angle BCD

Pls discuss answers.

The diagram shows you two cases using both the statements. In one case, you have a 60 degree angle, in the other case, you don't. Hence both statements together are insufficient.

Re: Is the measure of one of the interior angles of [#permalink]
10 Nov 2011, 01:04

in statement 1 it has been told us that two of the interior angles are of 180 hence substract 360-180=180 now reaching to second statement. One of the angle is twice the another. in that case i would go with formula x+2x=180 or 3x=180 hence x=60.

Re: Is the measure of one of the interior angles of [#permalink]
10 Nov 2011, 01:20

Expert's post

ankit123suhane wrote:

in statement 1 it has been told us that two of the interior angles are of 180 hence substract 360-180=180 now reaching to second statement. One of the angle is twice the another. in that case i would go with formula x+2x=180 or 3x=180 hence x=60.

please clariy

It is not given that the angle which is twice another angle is not 90. When you say x + 2x is 180, you are assuming that 2x is not one of the 90 degree angles. It is possible that the angles are 90, 90, 45 and 135 (look at the diagram above) _________________

1. 2 right angles. Others could be any degree measure. Insuff. 2. ABC = 2 BCD. Nothing conclusive here, we can have 60-120. 45-90....

Together, 2 right, so other two could be 60-120 OR we can have 45-90-90-135. Insuff.

E _________________

I am the master of my fate. I am the captain of my soul. Please consider giving +1 Kudos if deserved!

DS - If negative answer only, still sufficient. No need to find exact solution. PS - Always look at the answers first CR - Read the question stem first, hunt for conclusion SC - Meaning first, Grammar second RC - Mentally connect paragraphs as you proceed. Short = 2min, Long = 3-4 min

Re: Is the measure of one of the interior angles of quadrilatera [#permalink]
09 Mar 2012, 23:24

Another problem you can get without putting pen to paper! (I so like these!) _________________

If you like it, Kudo it!

"There is no alternative to hard work. If you don't do it now, you'll probably have to do it later. If you didn't need it now, you probably did it earlier. But there is no escaping it."

Re: Is the measure of one of the interior angles of quadrilatera [#permalink]
20 Jun 2014, 03:20

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. _________________

Re: Is the measure of one of the interior angles of quadrilatera [#permalink]
20 Jun 2014, 03:22

Bunuel wrote:

Is the measure of one of the interior angles of quadrilateral ABCD equal to 60? (1) Two of the interior angles of ABCD are right angles. (2) The degree measure of angle ABC is twice the degree measure of angle BCD.

Sum of inner angels of quadrilateral is 360 degrees. (Sum of inner angles of polygon=180*(n-2), where n is # of sides) (1) Angles can be 90+90 + any combination of two angels totaling 180. Not sufficient. (2) <ABC=2<BCD. Not sufficient

(1)+(2) Angles can be 90+90+45+135 Or 90+90+60+120 Not sufficient.

Answer: E.

And I spent 1 min 33 sec to make diagrams, evaluate the possibilities and solve the problem! Gosh, your approach seems so simple... _________________

Bored of all the GMAT and MBA stuff? Check this page out -Odds of meeting your spouse at MBA- it might give you something to laugh on or may be to be hopeful about...

For my Cambridge essay I have to write down by short and long term career objectives as a part of the personal statement. Easy enough I said, done it...