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by urooj.khan
Sun May 31, 2009 10:49 am
 
Forum: GMAT Official Practice Test Math
Topic: triangle inside circle gmat prep practice test #1
Replies: 3
Views: 5068
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triangle inside circle gmat prep practice test #1

hi i've been spending alot of time on this question and cant seem to get anywhere.. please help! the question is there is a triangle inside a circle...the diameter of the circle is 2 which is the base of the triangle... the centre of the circle is point O. Segment AO = OC = 1. A and C are on the ver...
by urooj.khan
Sun May 31, 2009 4:25 pm
 
Forum: GMAT Official Practice Test Math
Topic: two water pumps working simultaneously
Replies: 25
Views: 17609
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two water pumps working simultaneously

two water pumps working simultaneously at their respective constant rates, took exactly 4 hours to fill a certain swimming pool. If the constant rate of one pump was 1.5 times faster than constant rate of the other, how many hours would it have taken the faster pump to fill the swimming pool if it h...
by urooj.khan
Sun May 31, 2009 5:16 pm
 
Forum: GMAT Official Practice Test Math
Topic: if a quality control check is made by inspecting a sample
Replies: 8
Views: 8037
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if a quality control check is made by inspecting a sample

If a quality control check is made by inspecting a sample of 2 light bulbs from a box of 12 light bulbs, how many different samples can be chosen? a) 6 b) 24 c) 36 d) 66 e) 72 the answer is D the question is pretty easy and i know the answer is 12 choose 2, but what i'm struggling with is how to do ...
by urooj.khan
Sun May 31, 2009 5:20 pm
 
Forum: GMAT Official Practice Test Math
Topic: triangle inside circle gmat prep practice test #1
Replies: 3
Views: 5068
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Re: triangle inside circle gmat prep practice test #1

thanks stock.mojo11 !!

gotta know these properties better!
by urooj.khan
Sun May 31, 2009 6:32 pm
 
Forum: GMAT Official Practice Test Math
Topic: gmat prep software
Replies: 2
Views: 1514
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gmat prep software

just wondering if this is a CAT?
by urooj.khan
Sun May 31, 2009 6:48 pm
 
Forum: GMAT Official Practice Test Verbal
Topic: In Hungary, as in much of Eastern Europe
Replies: 60
Views: 43857
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Re: In Hungary, as in much of Eastern Europe

hmmn.... could someone please help me understand why "as in much..." is the correct way to start this part of the sentence...

i felt that "like much of..." would be the right way to go... but i'm clearly missing something
by urooj.khan
Sat Jun 06, 2009 2:27 pm
 
Forum: GMAT Official Practice Test Math
Topic: two water pumps working simultaneously
Replies: 25
Views: 17609
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Re: two water pumps working simultaneously

thanks guys...that really helps... !

RonPurewal, i got this problem from the gmat prep test #1 you can download from mba.com and copied the wording as-is
by urooj.khan
Sat Jun 06, 2009 2:28 pm
 
Forum: GMAT Official Practice Test Math
Topic: two water pumps working simultaneously
Replies: 25
Views: 17609
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Re: two water pumps working simultaneously

farooq.mazhar Wrote:Peter and Thomson complete a peace of work in 6 hrs. Peter is 1.5 faster than Thomson. If Peter would wanted to complete a peace of work independently, then Peter will takes ?

A: 12 hrs.
B: 15 hrs.
C: 10 hrs.
D: 20 hrs
E: 25 hrs


i tried both methods and got to the answer C: 10 hours.
by urooj.khan
Sat Jun 06, 2009 2:38 pm
 
Forum: GMAT Official Practice Test Math
Topic: if a quality control check is made by inspecting a sample
Replies: 8
Views: 8037
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Re: if a quality control check is made by inspecting a sample

thanks RonPurewal, that helps alot...

since we are discussing shortcuts....i came across another problem that went something like..." what is the sum of all integers from 132 to 531 inclusive?"

how do we go about solving this?
by urooj.khan
Sat Jun 13, 2009 6:12 pm
 
Forum: GMAT Official Practice Test Math
Topic: what is the average (arithmetic mean) height of the n people
Replies: 6
Views: 8970
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what is the average (arithmetic mean) height of the n people

what is the average (arithmetic mean) height of the n people of a certain group? (1) the average height of the n/3 tallest people in the group is 6 feet 2 1/2inches ( in decimal this would be =2.5 inches), and the average height of the rest of the people in the group is 5 feet 10 inches (2) the sum ...
by urooj.khan
Sat Jun 13, 2009 6:24 pm
 
Forum: GMAT Official Practice Test Math
Topic: if x plus y over z is equal to -2
Replies: 2
Views: 1520
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if x plus y over z is equal to -2

if x plus y over z is equal to -2, is x positive?

(1) z is negative
(2) y is positive

correct answer is e. i dont see how.