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GMAT SET

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Manager
Joined: 14 Jan 2006
Posts: 95
Schools: HKUST

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21 Sep 2008, 03:19
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Please try to solve this one
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Intern
Joined: 13 Aug 2008
Posts: 17

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21 Sep 2008, 04:17
IMO D, each stmt alone is sufficient. OA?
Intern
Joined: 21 Sep 2008
Posts: 17

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21 Sep 2008, 04:22
we can get the answer using the option A alone
Hint : equation of the circle is X^2 + Y^2 = r^2
where (x,y) is any point on the circle and r = radius of the circle
Current Student
Joined: 28 Dec 2004
Posts: 3342
Location: New York City
Schools: Wharton'11 HBS'12

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21 Sep 2008, 10:04
since its a circle and we know the radius..then once we know the x coordinate or y coordinate of Q we can tell the distance PQ..

I would go with D
Manager
Joined: 09 Jul 2007
Posts: 245

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21 Sep 2008, 10:32
1
KUDOS
IMO A.

x^2+Y^2 = 50^2

now,

1 ) x=-30, y can be either 40 or -40 => in both cases PQ is equal

2 ) y = -40 , x can be 30 or -30 => the PQ will be different in each case.. insufficient
Intern
Joined: 13 Aug 2008
Posts: 17

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21 Sep 2008, 20:38
why isnt stmt 2 alone sufficient? any ideas?
SVP
Joined: 17 Jun 2008
Posts: 1529

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22 Sep 2008, 00:23
ssandeepan wrote:
IMO A.

x^2+Y^2 = 50^2

now,

1 ) x=-30, y can be either 40 or -40 => in both cases PQ is equal

2 ) y = -40 , x can be 30 or -30 => the PQ will be different in each case.. insufficient

Nice explanation.
Director
Joined: 23 May 2008
Posts: 799

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22 Sep 2008, 21:48
can someone please explain why we are able to use the pythagorean theorem in this situation?
Re: GMAT SET   [#permalink] 22 Sep 2008, 21:48
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GMAT SET

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