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

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

Circular Drum - DS

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 184
Joined: Tue Sep 07, 2010 9:43 amFollowed by: 1 member
Thanked: 6 times
by rahulvsd » Tue Oct 18, 2011 7:22 am
A lever is attached to a circular drum. The lever is operated by turning it clockwise. Its current position is shown here. What is the angle formed by the starting position and the current position of the lever?

(1) If the lever were turned a additional 15º, it would complete a full circle from the starting position.

(2) If the lever were turned 75º less, it would be perpendicular to the lever at its original starting position.

OA: A. Here when we say additional 15 degrees it would mean additional in 15 clockwise direction. So will 75 degrees less mean 75 degrees shift in anticlockwise direction. Wont B sufficient too, but answer would be 165 degrees. Please help confused.
Image
Last edited by rahulvsd on Tue Oct 18, 2011 8:50 am, edited 1 time in total.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Tue Oct 18, 2011 8:08 am
rahulvsd wrote:A lever is attached to a circular drum. The lever is operated by turning it clockwise. Its current position is shown here. What is the angle formed by the starting position and the current position of the lever?

(1) If the lever were turned a additional 15º, it would complete a full circle from the starting position.

(2) If the lever were turned 75º less, it would be perpendicular to the lever at its original starting position.

Image
Statement 1: If the lever were turned an additional 15º, it would complete a full circle from the starting position.
The starting position is as follows:
Image
SUFFICIENT.

Statement 2: If the lever were turned 75º less, it would be perpendicular to the lever at its original starting position.
The starting position could be EITHER of the following:
Image
INSUFFICIENT.

The correct answer is A.
Last edited by GMATGuruNY on Tue Oct 18, 2011 9:21 am, edited 2 times in total.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 184
Joined: Tue Sep 07, 2010 9:43 amFollowed by: 1 member
Thanked: 6 times

by rahulvsd » Tue Oct 18, 2011 8:45 am
Hi Mitch,

Sorry I forgot to show upload the picture that was given in the question. Here if we go by the pic, wont the current position be fixed? In that case wont we get 165 degrees when it is turned 75 degrees anticlockwise (i.e. lesser)

Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Tue Oct 18, 2011 9:19 am
rahulvsd wrote:Hi Mitch,

Sorry I forgot to show upload the picture that was given in the question. Here if we go by the pic, wont the current position be fixed? In that case wont we get 165 degrees when it is turned 75 degrees anticlockwise (i.e. lesser)

Image
I've adjusted the figures in my post above. They reflect the drawing that you just added.
The correct answer remains A.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 184
Joined: Tue Sep 07, 2010 9:43 amFollowed by: 1 member
Thanked: 6 times

by rahulvsd » Tue Oct 18, 2011 9:31 am
Thanks a lot Mitch, makes sense to me now. I need to work more on circle problems.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1