Forum Home > GMAT > Quantitative > Problem Solving (PS)
Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Dec 1310:00 AM EST
-12:00 PM EST
Have you ever wondered how to score a PERFECT 805 on the GMAT? Meet Julia, a banking professional who used the Target Test Prep course to achieve this incredible feat. Julia's story is nothing short of an inspiration.
Dec 1410:00 AM EST
-12:00 PM EST
Think a 100% GMAT Verbal score is out of your reach? Target Test Prep will make you think again! Our course uses techniques such as topical study and spaced repetition to maximize knowledge retention and make studying simple and fun.
Dec 1411:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- Dec 15
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Dec 1608:00 AM PST
-11:59 PM PST
GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes!
31 Jan 2016, 08:26
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
52% (01:21) correct
48%
(01:32)
wrong
based on 221
sessions
History
Date
Time
Result
Not Attempted Yet
Where is the center of a circle on the xy plane?
(1) The circle passes through both the origin and (0,7).
(2) The diameter equals 10.
(1) The circle passes through both the origin and (0,7).
(2) The diameter equals 10.
31 Jan 2016, 08:34
Kudos
Bookmarks
Bunuel
Where is the center of a circle on the xy plane?
(1) The circle passes through both the origin and (0,7).
(2) The diameter equals 10.
(1) The circle passes through both the origin and (0,7).
(2) The diameter equals 10.
Hi,
Easy to make mistake, if done in a hurry, in these Q
Since no info in the Q stem, lets see the choices..
(1) The circle passes through both the origin and (0,7).
we may take this to be a diameter and thik it to be sufficient..
But it can be a chord or a diameter, so INSUFF
(2) The diameter equals 10.
clearly insuff
Combined..
we may take it to be sufficient as we know legth of a chord along with the coordinates and the dia too..
But we are not aware if the chord is below the dia or above the dia..
Accordingly the origin will change
E
06 Apr 2017, 19:11
Kudos
Bookmarks
Bunuel
Where is the center of a circle on the xy plane?
(1) The circle passes through both the origin and (0,7).
(2) The diameter equals 10.
(1) The circle passes through both the origin and (0,7).
(2) The diameter equals 10.
Suppose (x,y) is the centre of the circle. So the radius r can be defined as distance between the centre and any point on the circle.
So, x^2 +y^2 = x^2 + (y-7)^2 --> equation 1 from the statement 1. From this, we get the value of y.
From statement 2, diameter = 2r and since r^2 = x^2 +y^2 from statement 1 and we know the value of y, we can find x.
So, isn't C the answer? Correct me if I am wrong.
