Search found 788 matches
Re: DS GMATPrep
1 - insufficient.
Take {a = 8, b = 4, x = -0.5}, {a = 8, b = -4, x = 0.5}
x can be positive or negative
2 - insufficient
Take {a = 8, b = 4, x = -0.5}, {a = 8, b = -4, x = 0.5}
Together, same story.
Hence E
- by jayhawk2001
Fri Dec 14, 2007 11:35 am- Forum: Data Sufficiency
- Topic: DS GMATPrep
- Replies: 2
- Views: 1766
Re: pls help
I think the question is asking for a weighted average
i.e. .2 * 800k + .5 * 500k + .3*350k
- by jayhawk2001
Fri Dec 14, 2007 11:17 am- Forum: Problem Solving
- Topic: pls help
- Replies: 4
- Views: 1959
Re: How would you interpret this question?
One tends to say % of something. Percent by itself does not haveRiggz wrote:I cant remember the wording exactly.
X is equal to Y plus 40%. Z is equal to Y less 20%.
X = y + 40% or x = 1.40y
Z= y - 20% or z = 0.80y
any meaning. Given the above, I'm inclined towayds 1.4y and .8y
- by jayhawk2001
Fri Dec 14, 2007 11:06 am- Forum: Problem Solving
- Topic: How would you interpret this question?
- Replies: 2
- Views: 1671
Re: Geometry problem
If the area of square S and the area of circle C are equal, then the ratio of the perimeter of S to the circumference of C is closest to ... a)7/9 b)8/9 c)9/8 d)4/3 e)2/1 Not sure how to do this. s^2 = pi * r^2 s/r = sqrt(pi) So, 4s / (2*pi*r) = 2 / sqrt(pi) sqrt(pi) = sqrt(3.14) ~ 1.7 So, we know ...
- by jayhawk2001
Wed Dec 12, 2007 6:29 pm- Forum: Problem Solving
- Topic: Geometry problem
- Replies: 5
- Views: 1830
Please checkxcise_science wrote:Hi,
I don't understand how you concluded that its a right triangle thats formed.
http://www.beatthegmat.com/ps-t6611.html
- by jayhawk2001
Wed Dec 12, 2007 10:01 am- Forum: Problem Solving
- Topic: 2 problems from gmatprep
- Replies: 3
- Views: 1901
1 - insufficient. m/y = x/r. We don't know if m/r = x/y
2 - sufficient. my + xy = xr + xy.
So, m/r = x/y
Hence B
- by jayhawk2001
Tue Dec 11, 2007 5:47 pm- Forum: Data Sufficiency
- Topic: DS - ratio/propotion : confused.
- Replies: 1
- Views: 1541
We don't have to solve for k here. Question asks for k^2 - k.StarDust845 wrote:Why is the answer D?
I see it this way.
From stmt (1) we get k^2 - k - 1 = 0
If you solve this, you get k = (1 + Sqrt(5))/2 or k = (1 - sqrt(5))/2
So the answer can't be A or D.
- by jayhawk2001
Tue Dec 11, 2007 5:40 pm- Forum: Data Sufficiency
- Topic: DS
- Replies: 3
- Views: 1907
Re: absolute
magical cook wrote:if y>=0, what is the value of x?
1) lx-3l >= y
2) lx-3l <y>= 0.
Since y >=0, only value of y that satisfies this is y=0.
So |x-3| <= 0. So, we can find x.
Hence B
- by jayhawk2001
Tue Dec 11, 2007 11:51 am- Forum: Data Sufficiency
- Topic: absolute
- Replies: 10
- Views: 2474
Only E seems to be finite and bounded.
Can you please post option C. I don't see a choice 'c' in the
question
- by jayhawk2001
Sun Dec 09, 2007 8:37 am- Forum: Problem Solving
- Topic: inequity
- Replies: 6
- Views: 1914
Re: Integers
[quote="salma"]Is n an integer? (1) n^2 is an integer (2) square root of n is an integer The answers says that from (2) we can know that n is an integer but not from (1). I cannot think of a non integer which square root is an integer? Thx[/quote] 1 - insufficient. Knowing n^2 is an intege...
- by jayhawk2001
Sat Dec 08, 2007 4:38 pm- Forum: Data Sufficiency
- Topic: Integers
- Replies: 2
- Views: 1747
oops sorry, I attached the wrong image. here's the right one. Is it possible to delete the old one? Thanks I was wondering where GCF and LCM are in the previous question :-) Product of 2 numbers = LCM * GCF [ For reference: http://en.wikipedia.org/wiki/Greatest_common_divisor#Calculating_the_gcd ] ...
- by jayhawk2001
Sat Dec 08, 2007 4:35 pm- Forum: Data Sufficiency
- Topic: LCM & GSF DS probelm
- Replies: 3
- Views: 1926
1 - insufficient. take d=2, d=3. 100 and 1000 are factors of 30!
2 - insufficient. again, d could be anything
30! has 7 zeroes (5*2, 10, 15*4, 20, 25*8, 30 all yield zeroes). So,
knowing that d>6 is sufficient
Is it C
- by jayhawk2001
Sat Dec 08, 2007 10:13 am- Forum: Data Sufficiency
- Topic: LCM & GSF DS probelm
- Replies: 3
- Views: 1926
Let eqn of line n: y = m1x + c1
Eqn of line p: y = m2x + c2
1 - insufficient. we just have
1 = 5m1 + c1
1 = 5m2 + c2
2 - insufficient.
we just know c1 > c2
combining the two we can see that m2 > m1. Hence sufficient.
- by jayhawk2001
Sat Dec 08, 2007 9:51 am- Forum: Data Sufficiency
- Topic: DS Coordinate Geometry
- Replies: 3
- Views: 2366
- by jayhawk2001
Sat Dec 08, 2007 9:42 am- Forum: Problem Solving
- Topic: PS, tough probability
- Replies: 14
- Views: 5056
I get 1/32 as well
We are asked to find probability of HHHTT from the 32 possible
combinations. So, 1/32
- by jayhawk2001
Sat Dec 08, 2007 9:37 am- Forum: Problem Solving
- Topic: coin flipped?
- Replies: 6
- Views: 1924