Find all School-related info fast with the new School-Specific MBA Forum

It is currently 22 Jul 2014, 11:47

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Circle C and line K lie in the xy plane.If circle C is

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 21 Feb 2009
Posts: 110
Followers: 1

Kudos [?]: 13 [0], given: 4

Circle C and line K lie in the xy plane.If circle C is [#permalink] New post 26 Mar 2009, 11:49
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

71% (02:06) correct 29% (00:15) wrong based on 13 sessions
Circle C and line K lie in the xy plane.If circle C is centered at the origin and has radius 1,does line k intersect circle C?
1. The x-intercept of line k is greater than 1.
2. The slope of line k is -1/10
Manager
Manager
avatar
Joined: 19 May 2008
Posts: 165
Location: Mumbai
Followers: 1

Kudos [?]: 2 [0], given: 0

GMAT Tests User
Re: Data Sufficiency-1 [#permalink] New post 26 Mar 2009, 12:06
1. The x-intercept of line k is greater than 1.

We know the x-intercept but the slope of the line is not known. If line k has a very small slope and intersects the x-axis at 2,3,4..the line will intersect the circle and if the x-intercept is a relatively large number with a high slope, it will not intersect the circle...So statement 1 is insufficient.

2. The slope of line k is -1/10

Again, we know the slope, but we dont know where it intersects the x-axis. We know that we have a relatively flat line..so if it intersects the x-axis at 2,3,4,5..10 , it will intersect the circle but if it intersects the x-axis at 50,100,200 , it will not intersect the circle..So statement 2 is insufficient.

We are down to C and E.

Together, we again dont have sufficient info.
Let's take an example
Slope=-1/10 , x-axis intersection at (4,0)
y-y1=m(x-x1)
y=-0.1x+0.4...this line will intersect the y-axis at 0.4 ( hence intersect circle)

take another example
slope=-1/10, x-axis intersection at (100,0)
y=-0.1x+10 ..this line will intersect the y-axis at 10 ( hence NOT intersect the circle)...So it is insufficient.

Answer is E
What's the OA?
1 KUDOS received
Senior Manager
Senior Manager
User avatar
Joined: 16 Jan 2009
Posts: 362
Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)
Followers: 2

Kudos [?]: 65 [1] , given: 16

GMAT Tests User
Re: Data Sufficiency-1 [#permalink] New post 26 Mar 2009, 12:12
1
This post received
KUDOS
let equation of the line k be
y = mx + b

1. The x-intercept of line k is greater than 1.
- it can be 1.5 or 100 , does not specify anything specific , INSUFFICIENT.

2. The slope of line k is -1/10
so ,
y = -x/10 + b
still , INSUFFICIENT as no information has been mentioned regarding x.

using both together,
y = -x/10 + b
still , INSUFFICIENT as b varies with x and may or may not be less than 1.

Answer : E
_________________

Lahoosaher

Manager
Manager
avatar
Joined: 21 Feb 2009
Posts: 110
Followers: 1

Kudos [?]: 13 [0], given: 4

Re: Data Sufficiency-1 [#permalink] New post 26 Mar 2009, 14:34
Perfect Guys.... OA is E
Re: Data Sufficiency-1   [#permalink] 26 Mar 2009, 14:34
    Similar topics Author Replies Last post
Similar
Topics:
Ciricle C and line K are in xy-plane.If circle C is centered shils01 2 02 Apr 2008, 08:59
Circle C and line k lie in the xy-plane. If circle C is SimaQ 2 18 Nov 2006, 08:40
Circle C and line K lie in the xy plane. If circle C, Paayal 6 05 Oct 2006, 17:34
Circle C and line K lie in xy-plane. If circle C is centered gmacvik 1 15 Sep 2006, 15:58
Circle C and line k lie in the xy-plane. If circle C is joemama142000 9 18 Dec 2005, 12:26
Display posts from previous: Sort by

Circle C and line K lie in the xy plane.If circle C is

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.