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
GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
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 Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget 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

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

OG-12 DS #117

Expert replies
by papgust » Sat Mar 06, 2010 7:41 pm
In the figure above, points A, B, C, D, and E lie on a line. A is on both circles, B is the center of the smaller circle, C is the center of the larger circle, D is on the smaller circle, and E is on the larger circle. What is the area of the region inside the larger circle and outside the smaller circle?

(1) AB = 3 and BC = 2
(2) CD = 1 and DE = 4

Please refer the diagram in OG

OA: D


My doubt:

I actually selected A and ignored statement (ii) as insufficient because I thought that i should not trust the diagram without further information. In other words, statement (ii) says that CD=1 and DE=4. From the diagram, we could infer that CE is the radius and therefore CE = CD+DE = 1+4 = 5 (This is what is given in OG-12)

But, i thought that D could be outside the inner circle and could also be inside the inner circle. That is, there could be 2 possibilities

If D is outside the inner circle, then CE = CD+DE = 5 (radius of outer circle)
If D is inside the inner circle, then CE = DE - CD = 3 (radius of outer circle)

For this reason, i ignored B and selected A.

What is wrong in my thought? Did i go beyond the scope of ambiguity in diagrams? If so, why?
Join the discussion
Source: — Data Sufficiency |

by bpgen » Sun Mar 07, 2010 1:09 am
As it's saying 'D is on the smaller circle, and E is on the larger circle" , that means D, E are laying on circumference of circle... not inside or outside. Hope this helps.
"Ambition is the path to success. Persistence is the vehicle you arrive in."
Join the discussion

by papgust » Sun Mar 07, 2010 4:47 am
Alright. But, C could be either inside or outside the smaller circle. Is there any proof provided in the question stem that C is only inside the smaller circle?
Join the discussion

by bpgen » Sun Mar 07, 2010 6:53 am
What does it mean? If you see diagram it could be seen clearly... :-)

Anyway, would that position of C, affecting your decision making process?
Even for your sake, I could assume C is outside of small circle, still we could solve this problem..

(1) AB = 3 and BC = 2
(2) CD = 1 and DE = 4

so if C is inside, no issues, solution is in OG,
Let's see C is outside of small circle,
So, big circle's radius would be DE-CD, where small circle's diameter would be 2(DE-CD)-DE, i.e AD
Hope this helps.
"Ambition is the path to success. Persistence is the vehicle you arrive in."
Join the discussion

by papgust » Sun Mar 07, 2010 9:01 am
bpgen wrote:What does it mean? If you see diagram it could be seen clearly... :-)
My question is just this. It can be seen clearly from the diagram that C is inside the inner circle. Agreed. But the diagram is not measured to scale. Neither it is mentioned specifically that C falls within the inner circle.

So, to what extent i could trust the diagram?

Really appreciate you for being patient to answer my questions :)
Join the discussion

by kstv » Sun Mar 07, 2010 10:21 am
It is like the Emperors cloth , everyone can see it but I cannot see the diagram.
Join the discussion

by bpgen » Sun Mar 07, 2010 11:06 am
kstv, pls refer to OG-12 DS #117
"Ambition is the path to success. Persistence is the vehicle you arrive in."
Join the discussion