BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
Vote for Target Test Prep, Newsweek Readers’ Choice Awards 2026
NEWSWEEK READERS’ CHOICE 2026

BIG NEWS! Target Test Prep has been nominated, and they’d love your vote!

TTP has worked incredibly hard to build the best test prep experience possible, and winning Newsweek’s 2026 Readers’ Choice Award for Best Test Prep would mean a lot to them. If TTP has helped you, they’d be incredibly grateful for your vote. You can vote once each day through September 9.

Vote for TTP
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

What is the radius of the circle with Center O

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 641
Joined: Tue Feb 14, 2012 3:52 pmFollowed by: 8 members
Thanked: 11 times
by gmattesttaker2 » Wed Jul 04, 2012 10:36 am
This is from OG 10th Edition. Sorry, I dont have the OA

What is the radius of the circle below with Center O?

1) The ratio of OP to PQ is 1 to 2
2) P is the midpoint of chord AB

Any suggestions? Thanks.

Regards,
Sri
Attachments
Circle.png
Circle with Center O
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

by Brent@GMATPrepNow » Wed Jul 04, 2012 10:52 am
For DS questions involving Geometry, there's a nice rule that says, "To find one length, we need at least one other length."
Since no lengths are provided in either statement, the answer must be E

If you're interested, we have a free video about Geometry DS questions here: https://www.gmatprepnow.com/module/gmat- ... cy?id=1103

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 520
Joined: Sat Apr 28, 2012 9:12 pmFollowed by: 49 members
Thanked: 339 times
GMAT Score:770

by eagleeye » Wed Jul 04, 2012 10:54 am
Hi Sri:

This requires a bit of alternate thinking. We need to find the length of the radius.

Statement 1 talks about a ratio. No length given. Not sufficient
Statement 2 also talks about a ratio. Again, no length given. Not sufficient.
Together, they both talk about ratios. None talks about length. Hence, together they are insufficient as well.

E is the answer.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 641
Joined: Tue Feb 14, 2012 3:52 pmFollowed by: 8 members
Thanked: 11 times

by gmattesttaker2 » Wed Jul 04, 2012 4:44 pm
Hello Brent and Eagleeye,

Many thanks for your explanations here.

Best Regards,
Sri
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Sun Dec 01, 2013 1:01 am

by prasi009 » Sun Dec 01, 2013 4:25 am
if u refer to the figure and assume the first statement as

x:2x

and next as

y:y (as p is the mid point of ab)

Draw radii to A nd B mark both as r

now we can say

r=root(x^2 + y^2)

anyway we cannot determine the actual lengths or radii


besides my argument is flawed in assuming the intersection is at right angles

so in any any any case no matter what u do u simply cannot find the length as pointed out
by someone here its all ratios there is no ways we can tell the actual length
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8183
Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members
Location: Los Angeles, CA
Thanked: 43 times

Re: What is the radius of the circle with Center O

by Scott@TargetTestPrep » Mon Jul 05, 2021 6:13 am
gmattesttaker2 wrote: ↑
Wed Jul 04, 2012 10:36 am
 This is from OG 10th Edition. Sorry, I dont have the OA

What is the radius of the circle below with Center O?

1) The ratio of OP to PQ is 1 to 2
2) P is the midpoint of chord AB

Solution:

Question Stem Analysis:

We need to determine the radius of circle O, i.e., the length of OQ.

Statement One Alone:

We see that OQ is 3 * OP. However, since we can’t determine the length of OP, we can’t determine the length of OQ. Statement one alone is not sufficient.

Statement Two Alone:

This just tells us that AP = PB and AB is perpendicular to OQ. It doesn’t allow us to determine the length of OQ. Statement two alone is not sufficient.

Statements One and Two Together:

With the two statements, we still can’t determine the length of OQ. We actually can’t even determine the length of any segment in the diagram, such as OP, PQ, AP, or BP. Both statements together are still not sufficient.

Answer: E

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1