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GMAT Data Sufficiency | Forum profile
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Forum profile page for GMAT Data Sufficiency on http://www.urch.com.
This report page is the aggregated overview from a single forum: GMAT Data Sufficiency , located on the Message Board at http://www.urch.com.
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Posting activity on GMAT Data Sufficiency :
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3 Months
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Threads:
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48
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Post:
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2,486
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GMAT Data Sufficiency Posting activity graph:
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Top authors during last week:
user's latest post:
A tough DS question
Published (2009-11-14 11:54:00)
Quote: Originally Posted by clock60 hi Fiver i am totaly baffled can you explain for the layman how it could be n>20! and 1>n Ok. Now i see what u mean. I've got this strange thing for flipping over signs I mistook given info 1>f>n for 1<f<n But then how can n>20! and n<1 at the same time? I think st1. seems to be the result of a typographical error. Can atishree please confirm the...
user's latest post:
Plz explain
Published (2009-11-15 20:05:00)
my pick for D .. reasoning (1) if the shorter side is 2 than the next side will have the least lengh also 2 and the diagonal 2^2+2^2=4+4=8 d^2=8 d=(8)^1/2 bigger than 6^1/2 so sufficient (2) if longer side is 3, (diagonal)^2=3^2+any positive number will be greater that 6^1/2 as 3^2=9 sufficient so D
user's latest post:
Gprep:Factors
Published (2009-11-13 11:30:00)
Quote: Originally Posted by clock60 not sure that the answer is D my pick for B (1) k prime, if k =2 then 2^2*5^1^2^1=2^3*5^1 so the number of factors will be (3+1)(1+1)=8 but if k=3 also prime than 2^2*5^1*3^1 so the number of factors (2+1)(1+1)(1+1)=3*2*2=12 so 1st insufficient (2) sufficient as clearly point out that k=7 so B (what i am missing???) Opps forgot to consider that prime no could be 2, or 5 as well B is correct
user's latest post:
OG10 DS 218 at least twice the...
Published (2009-11-13 14:15:00)
Quote: Originally Posted by mitzi Namaste guru nverma, for any real value of n 3^n cannot be 0...so definitely as per the question b-a is more twice the value of 3^n-2^n.. PLease somebody explain me this point
user's latest post:
A tough DS question
Published (2009-11-14 13:29:00)
f is a positive integer and 1>f>n?
user's latest post:
Slopes
Published (2009-11-11 07:42:00)
Can you please explain Slope = (y intercept) / (x intercept)? Don't you need two points to determine a slope? Sorry for being primitive.
user's latest post:
Sequence-Gprep
Published (2009-11-13 07:22:00)
IMO - B If a(n) = a(n-1) + k, then a(1), a(2),.....a(15) is an arithmetic progression. Statement (2) says a(8) = 10 a(8) is the middle term and hence the Median of this series. The number k can be positive or negative. If k is negative, then the numbers a(1), a(2) etc. will be in descending order and if it is positive, then the series will be in ascending order. No matter what, there will be 7 terms which will be greater than 10 (Please note...
user's latest post:
Is x^2 equal to xy?
Published (2009-11-09 03:48:00)
I got it! I feel embarrassed to ask this fundamental step. Thank you for sharing the love!!! that's what I need. Mitzi
user's latest post:
Another DS
Published (2009-11-13 03:14:00)
1. If xy 0, is xy = 70? (1) x > y (2) x 2 = y 2 2. The total cost of a car rental at Company X is equal to a base fee per day plus a charge of $0.30 per mile. What was the cost of Peter ’ s rental from Company X ? (1) Peter drove a total of 25 miles. (2) The base fee per day for a car from Company X is $50.00.
user's latest post:
DS.
Published (2009-11-11 16:28:00)
That's a wonderful solution. Thanks a lot. What's your real or mocktest based GMAT score?
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Latest active threads on GMAT Data Sufficiency ::
Started 4 days, 3 hours ago (2009-11-12 21:58:00)
by clock60
hi onedayI"II
can you kindly clarify what do you mean in second statement by !0
is it 10, or 0! or 0
i see that 1 st is not sufficient but have no ideas about 2
is |x|<1 or other said is
-1<x<1
(1)|x+1|=2|x-1|
this equation is true for x=3, that is >1 and x=1/3 that is between -1 and 1
we can not ignore that x=1/3 as we are not said that x is integer
so st 1 insuffcient
Started 1 week, 1 day ago (2009-11-08 21:13:00)
by cristofer
another way of phrasing the question is "does x = 0 or y?" since x^2=xy
can be wrtten as x(x-y)=0
so 2 is definitely sufficient
1 is insuff because you could have x=-5 and y=5 (no), or x=5 and y=5 (yes). there are more examples that give answers of no and yes, i just picked some easy ones.
so the answer is B?
Started 1 week, 4 days ago (2009-11-05 05:32:00)
by thatsku
Answer explanation will follow after discussion.....
Started 18 hours, 59 minutes ago (2009-11-16 06:40:00)
by EdYo
IMO E
(1) what if 0 is the median? and 0 is neither negative or positive --> INS
(2)Use 0 as an evidence to make this INS
(1)&(2) INS
hence E
Started 1 week, 4 days ago (2009-11-05 14:09:00)
by Fiver
Given a<y<z<b
Is |y-a|<|y-b|?
Here y-a>0 as given y>a and y-b<0 as given b>y.
Hence the question is: Is y-a > b-y. Or is 2y>b+a ?
1)|z-a|<|z-b|
Here z-a>0 as given z>a and z-b<0 as given z<b
Hence this becomes: z-a>b-z. Or 2z>b+a.
Now since given that z>y and that 2z>b+a we cannot be sure whether 2y>b+a. Hence Insufficient.
2)|y-a|<|z-b|
Here y-a>0 as given a<y and z-b<0 as given ...
Started 3 days, 14 hours ago (2009-11-13 11:09:00)
by atishree
n and f are positive integers. Is n multiple of f?
(1) n> 20! and 1<f<n
(2) n = 20! +f and 2 <= f <= 20
Hi guys corrected the question, my bad
Started 2 days, 6 hours ago (2009-11-14 19:29:00)
by clock60
hi ramiy can you add in the problem
bigger than what????
Started 4 days, 6 hours ago (2009-11-12 19:07:00)
by finsisher
answer should be C
we know the first term and one of the term 8th term of an AP so we can find out the AP.. hence C
Started 2 weeks, 1 day ago (2009-11-01 22:04:00)
by nverma
Quote:
Originally Posted by mitzi
if n is a positive integer, is the value of b-a at least twice the value of 3^n-2^n?
1) a=2 n+1 and b = n+1
2) n=3
I think that 2) is insufficient(I can get it)
With respect to 1)
first I substituted a and be into the given equation.
3^(n+1) - 2^(n+1)
= 3(3^n) - 2(2^n)
second
3(3^...
Started 4 days, 6 hours ago (2009-11-12 19:04:00)
by finsisher
answer should be D
20k = 2^2 *5*k
no. of +ve factors = 3*2* 2 if k is prime and both the stmts says k is prime so D is ok
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Hot threads for last week on GMAT Data Sufficiency ::
Started 1 week, 1 day ago (2009-11-08 21:13:00)
by cristofer
another way of phrasing the question is "does x = 0 or y?" since x^2=xy
can be wrtten as x(x-y)=0
so 2 is definitely sufficient
1 is insuff because you could have x=-5 and y=5 (no), or x=5 and y=5 (yes). there are more examples that give answers of no and yes, i just picked some easy ones.
so the answer is B?
Started 1 week ago (2009-11-09 14:27:00)
by abhasjha
I think it should be C
Slope = ( y intercept) / (x intercept)
Slope of L = y1/x1
Slope of K = y2/x2
Multiple = (y1 * y2) / (x1 * x2)
Started 4 days, 6 hours ago (2009-11-12 19:07:00)
by finsisher
answer should be C
we know the first term and one of the term 8th term of an AP so we can find out the AP.. hence C
Started 3 days, 14 hours ago (2009-11-13 11:09:00)
by atishree
n and f are positive integers. Is n multiple of f?
(1) n> 20! and 1<f<n
(2) n = 20! +f and 2 <= f <= 20
Hi guys corrected the question, my bad
Started 1 week ago (2009-11-09 13:57:00)
by kuemura
In the XY-Coordinate plane, Line L and Line K intersect at point (4,3). Is the product of these slopes negative?
(1) The product of the X-intercept of Line L and Line K is positive
(2) The product of the Y-intercept of Line L and Line K is negative
Started 1 week ago (2009-11-09 18:56:00)
by socker121314
Started 4 days, 6 hours ago (2009-11-12 19:04:00)
by finsisher
answer should be D
20k = 2^2 *5*k
no. of +ve factors = 3*2* 2 if k is prime and both the stmts says k is prime so D is ok
Started 1 week ago (2009-11-09 14:31:00)
by abhasjha
IMO - E
statement (1)
we know that the angles are 90°, 90°, x, y, and that all of them sum to 360°.
by subtraction, x + y must be 180°.
it's possible that one of them could be 60° (if the other one is 120°), but it's also possible for neither of them to be 60° (if they have any measures other than 60° and 120°).
insufficient.
statement (2)
you could pick any 1:2 ...
Started 1 week, 2 days ago (2009-11-07 16:49:00)
by StudyGMAT
I think the answers are E and C
Started 4 days, 3 hours ago (2009-11-12 21:58:00)
by clock60
hi onedayI"II
can you kindly clarify what do you mean in second statement by !0
is it 10, or 0! or 0
i see that 1 st is not sufficient but have no ideas about 2
is |x|<1 or other said is
-1<x<1
(1)|x+1|=2|x-1|
this equation is true for x=3, that is >1 and x=1/3 that is between -1 and 1
we can not ignore that x=1/3 as we are not said that x is integer
so st 1 insuffcient
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