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

It is currently 22 Feb 2019, 16:57

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
Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Free GMAT RC Webinar

     February 23, 2019

     February 23, 2019

     07:00 AM PST

     09:00 AM PST

    Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT
  • FREE Quant Workshop by e-GMAT!

     February 24, 2019

     February 24, 2019

     07:00 AM PST

     09:00 AM PST

    Get personalized insights on how to achieve your Target Quant Score.

What is the area of the above circle?

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

Hide Tags

 
Senior DS Moderator
User avatar
V
Joined: 27 Oct 2017
Posts: 1207
Location: India
Concentration: International Business, General Management
GPA: 3.64
WE: Business Development (Energy and Utilities)
Premium Member CAT Tests
What is the area of the above circle?  [#permalink]

Show Tags

New post 13 Oct 2018, 09:25
5
00:00
A
B
C
D
E

Difficulty:

  85% (hard)

Question Stats:

35% (02:05) correct 65% (02:13) wrong based on 30 sessions

HideShow timer Statistics

Attachment:
Q2.jpg
Q2.jpg [ 30.25 KiB | Viewed 404 times ]
What is the area of the above circle?
1) Angle ABC = 90 deg
B) CD = 12

Weekly Quant Quiz #4 Ques 6


_________________

Win GMAT CLUB Test- Weekly Quant Quiz Contest
Weekly Quant Quiz Questions- Direct Download
SC: Confusable words

All you need for Quant, GMAT PS Question Directory,GMAT DS Question Directory
Error log/Key Concepts
Combination Concept: Division into groups
Question of the Day (QOTD)
Free GMAT CATS

Most Helpful Community Reply
Senior DS Moderator
User avatar
V
Joined: 27 Oct 2017
Posts: 1207
Location: India
Concentration: International Business, General Management
GPA: 3.64
WE: Business Development (Energy and Utilities)
Premium Member CAT Tests
Re: What is the area of the above circle?  [#permalink]

Show Tags

New post 13 Oct 2018, 20:09
1
This Question can be easily explained using one of the basic property:

A Unique Circle can be drawn using 3 non-collinear points.


As we need the radius of the circle, we need to find the relative position of points wrt each other.
Let us suppose that point C (0,0)
Statement 1: Points C (0,0), A(15,8), D(0,-k) where k is length of CD
Since all points are not defined , circle is not defined.
NOT SUFFICIENT
Statement 2: Points C (0,0), D(0,-12), point A not defined.
NOT SUFFICIENT

combining Statement 1& 2 , we get
Points are A(15,8) C(0,0) and D(0, -12), hence a unique circle can be drawn and its area can be calculated.
SUFFICIENT.
Answer C

(Since, It is a DS Question, there is no need to find the exact area, we need to know whether it can be determined uniquely or not)
_________________

Win GMAT CLUB Test- Weekly Quant Quiz Contest
Weekly Quant Quiz Questions- Direct Download
SC: Confusable words

All you need for Quant, GMAT PS Question Directory,GMAT DS Question Directory
Error log/Key Concepts
Combination Concept: Division into groups
Question of the Day (QOTD)
Free GMAT CATS

General Discussion
Manager
Manager
avatar
S
Joined: 05 Jul 2018
Posts: 56
Location: India
Concentration: General Management, Technology
GRE 1: Q162 V149
GPA: 3.6
WE: Information Technology (Consulting)
CAT Tests
Re: What is the area of the above circle?  [#permalink]

Show Tags

New post 13 Oct 2018, 09:43
Extended CB will touch the circle on point E(let us assume). Now DE has to be the diameter of the Circle. To be able to find length of DE we must be able to find the length of BE first. Now let us see if Either of the statements help us in finding the length of BE(where E is the point where extended CB touches the other end of circle).

1)Angle ABC = 90 deg . This only gives the length of AC the hypotenuse of triangle ABC. Hence NOT SUFFICIENT
2) CD = 12 . This info does not help us in finding the length of BE. Hence this too is NOT SUFFICIENT

Hence, the answer must be E
_________________

Appreciate any KUDOS given ! :)
MY MBA RESOURCES:

RC Moderator
User avatar
D
Joined: 24 Aug 2016
Posts: 681
Location: Canada
Concentration: Entrepreneurship, Operations
GMAT 1: 630 Q48 V28
GMAT 2: 540 Q49 V16
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Re: What is the area of the above circle?  [#permalink]

Show Tags

New post 13 Oct 2018, 10:04
1) Angle ABC = 90 deg.... NS .... we only get AC=17... not the radius or dia
2) CD = 12 .... NS .... we only get AD=25... not the radius or dia

Ans E
_________________

Please let me know if I am going in wrong direction.
Thanks in appreciation.

GMAT Club Bot
Re: What is the area of the above circle?   [#permalink] 13 Oct 2018, 10:04
Display posts from previous: Sort by

What is the area of the above circle?

  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®.