GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 19 Oct 2018, 03:04

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

A circle with center (1, 0) lies in the coordinate plane shown above.

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 50001
A circle with center (1, 0) lies in the coordinate plane shown above.  [#permalink]

Show Tags

New post 17 Sep 2018, 22:14
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

32% (02:47) correct 68% (02:00) wrong based on 25 sessions

HideShow timer Statistics

Image
A circle with center (1, 0) lies in the coordinate plane shown above. If points (x, y) and (3, 0) lie on the circle is (x, y) in quadrant 1?

(1) –1 < y < 1
(2) –1 < x < 1


Attachment:
image017.jpg
image017.jpg [ 1.42 KiB | Viewed 423 times ]

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

examPAL Representative
User avatar
G
Joined: 07 Dec 2017
Posts: 718
Re: A circle with center (1, 0) lies in the coordinate plane shown above.  [#permalink]

Show Tags

New post 18 Sep 2018, 11:53
Bunuel wrote:
Image
A circle with center (1, 0) lies in the coordinate plane shown above. If points (x, y) and (3, 0) lie on the circle is (x, y) in quadrant 1?

(1) –1 < y < 1
(2) –1 < x < 1


Attachment:
image017.jpg


As the circle has center at (1,0) and another point at (3,0), it has radius 2. (because the distance from (3,0) to (1,0) is 2).
In coordinate geometry, making an accurate geometry (an Alternative approach) can help save a lot of work.
In this case, drawing a circle of radius 2 with center at (1,0) we can SEE that the circle passes through all 4 quadrants.

(1) Drawing lines at y = 1 and y = -1 we can SEE that they intersect the circle in all four quadrants. Since we can pick any (x,y) we like between these lines, we can pick any quadrant we like.
Insufficient.
(2) Once again, drawing lines at x = -1 and x = 1, we can SEE the intersections are through the center and tangent to the left edge of the circle. As before, we can pick any points we like.
Insufficient.

Combined. Looking at our drawing, we can see that the only relevant points have x < 0, meaning they are not in the 1st quadrant.
Sufficient.

(C) is our answer
_________________

Image
Sign up for 7-day free trial
Image

I am a CR Expert - Ask Me ANYTHING about CR
I am a DS Expert - Ask Me ANYTHING about DS


Watch free GMAT tutorials in Math, Verbal, IR, and AWA.

GMAT test takers: Watch now the GMAC interview with the people who write the GMAT test!
We discussed the chances of improving a GMAT score; how important the first questions on the test are; what to do if you don’t have enough time to complete a whole section; and more.

You can watch all the action from the interview here.

GMAT Club Bot
Re: A circle with center (1, 0) lies in the coordinate plane shown above. &nbs [#permalink] 18 Sep 2018, 11:53
Display posts from previous: Sort by

A circle with center (1, 0) lies in the coordinate plane shown above.

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.