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yes, you are right. Thanks for pointing that gmatmachoman.gmatmachoman wrote: seer bhai!
In my screen shot its showing
m> t ^(-4)
> 1/(t^4)
m>0
even if t is a imaginary number, m>0
SO pick D
the explanation holds as long as t has an even power.
- by iamseer
Tue May 11, 2010 8:25 am- Forum: Data Sufficiency
- Topic: Inequalities
- Replies: 4
- Views: 1169
time taken is multiple of 30 for every subsequent distance r/2govind_raj_76 wrote: Sameer - How did you arrive at the one below ??
(16+32+64+128)/(1+2+4+8) =16
first r/2 in 30 seconds
seconds r/2 in 60 seconds
and so on
and one round = 4*(r/2)
HTH!!
- by iamseer
Mon May 10, 2010 11:14 pm- Forum: Problem Solving
- Topic: sprinter starts running
- Replies: 8
- Views: 4511
the arguments speaks of all benefits (increase worker productivity, reduce absenteeism, and lessen insurance costs for employee health care) as far as the company is concerned and at the end jumps to conclude that these programs benefit both the company and the employees. If we have to strengthen th...
- by iamseer
Mon May 10, 2010 12:38 pm- Forum: Critical Reasoning
- Topic: 1000CR Question No 2 : Test 14
- Replies: 4
- Views: 2857
A majority of railway commuters reads or listens to music while traveling - is correct The majority of the students in this class are hard workers - is correct The majority of students are smart. A majority of students are smart. The majority of physics students are smart. A majority of physics stu...
- by iamseer
Mon May 10, 2010 12:24 pm- Forum: Sentence Correction
- Topic: The Majority Vs A majority!!
- Replies: 2
- Views: 2103
am sure experts will reply. In the mean while, here are my 2 cents. Collective noun takes a singular verb when the collection is thought of a one whole and it takes a plural verb when the individuals of which it is composed are thought of. The committee has issued its report The committee are divide...
- by iamseer
Mon May 10, 2010 12:12 pm- Forum: Sentence Correction
- Topic: The Majority Vs A majority!!
- Replies: 2
- Views: 2103
Most fruit is sprayed with dangerous pesticides before it is harvested, and is dangerous until it is washed . Clearly, the cafeteria is selling pesticide-covered fruit, If the fruit has been washed prior to reaching the cafeteria, is it dangerous for people to eat it? @Kevin: I am not arguing but r...
- by iamseer
Sun May 09, 2010 7:25 pm- Forum: Critical Reasoning
- Topic: The apples sold in this cafeteria are greasy
- Replies: 37
- Views: 7848
If B is false, could the conclusion still be valid? Yes: If the greasy residue is due to the fact that the apples have never been washed, any pesticide (greasy or not) would still be on the apples when they are sold. Thus B is NOT an assumption underying the argument. On the other hand, if A is fal...
- by iamseer
Sun May 09, 2010 12:15 pm- Forum: Critical Reasoning
- Topic: The apples sold in this cafeteria are greasy
- Replies: 37
- Views: 7848
Since y^2 is >0 we can cross multiply. from 1: x,y, Is (y^2*x^2-Y^3)>1? 2,3, Is (36-27)>1 Yes 0.1,0.2 (everything less than 1) NO Not Sufficient from 2: x^2,y^2, Is (y^2*x^2-Y^3)>1? take x=sqrt2 and y=sqrt3 2,3, Is (36-27)>1 Yes take x=0.1, y=0.2 0.01,0.04 (everything less than 1) NO Not Sufficient ...
- by iamseer
Sun May 09, 2010 11:30 am- Forum: Data Sufficiency
- Topic: Is x² - y > 1/y²
- Replies: 1
- Views: 1167
Didn't understand the explanation. As per the answer sheet, correct answer is A, although i am confused whether that is correct or not. for St 1: draw two line AD and BC on a piece of paper. Now draw a transversal CA such that angle y=40.... Now, with just this much information, one can plot the po...
- by iamseer
Sun May 09, 2010 11:16 am- Forum: Data Sufficiency
- Topic: Answer explanation needed.
- Replies: 7
- Views: 5938
vmt not equal 0. Therefore none of them is zero.
from 1:
m>v^2
therefore m >0
therefore v^2*m^3*t^4>0 (only m could make this negative, squares and forth powers are always positive)
Sufficient
from 2:
m>t^4
again m>0
therefore v^2*m^3*t^4>0
Sufficient
IMO answer D
- by iamseer
Sun May 09, 2010 11:09 am- Forum: Data Sufficiency
- Topic: Inequalities
- Replies: 4
- Views: 1169
from 1:
Point D could be anywhere on line AD
Insufficient
from 2:
Point A could be anywhere on line AD
Insufficient
Combining 1 and 2:
Sum of all angles of a triangle is 180.
Sufficient
IMO answer C
- by iamseer
Sun May 09, 2010 11:00 am- Forum: Data Sufficiency
- Topic: Answer explanation needed.
- Replies: 7
- Views: 5938
from 1:
x+2y>8
x,y,x+2y, Is x+y>6?
0,5,10, NO
4,4,12, YES
Not Sufficient
from 2:
Similarly like 1.
Not Sufficient
Combining 1 and 2:
3x+3y>16
x+y>16/3.... So it can be >6 or <6 or =6
Not sufficient
IMO answer E
- by iamseer
Sun May 09, 2010 10:56 am- Forum: Data Sufficiency
- Topic: Ds 1
- Replies: 4
- Views: 1251
from 1:
Since x>r and y<s, we are subtracting a smaller quantity from a bigger quantity. So, (x - y) > (r - s) is always true.
Sufficient.
from 2:
xy<rs
x,y,r,s,xy,rs, Is (x - y) > (r - s)
3,4,5,3,12,15, NO
3,-4,5,3,-12,15, YES
Not Sufficient
IMO answer A
- by iamseer
Sun May 09, 2010 10:51 am- Forum: Data Sufficiency
- Topic: DS2
- Replies: 2
- Views: 1222
IMO B
drop a perpendicular from B on AD.Let that point be X. BX has length of 3. AX =3 b'cos 45-45-90 triangle. Also, AB =3sqrt2
also, BC=8-3=5
therefore perimeter = 2*(5+3sqrt2) = 10 + 6sqrt2
HTH!!
- by iamseer
Sun May 09, 2010 10:42 am- Forum: Problem Solving
- Topic: Coordinate geometry
- Replies: 5
- Views: 1024
iamseer wrote:from 1:
y>0
therefore 3y >0
-2x>3y therefore -2x>0
therefore x has to be negative
Sufficient
from 2:
2x+5y=20
y=(20-2x)/5
3y= (60-6x)/5
-2x > (60-6x)/5
-10x > 60 - 6x
-4x>60
therefore x is negative.
Sufficient.
answer D
- by iamseer
Sat May 08, 2010 11:05 pm- Forum: Data Sufficiency
- Topic: DS-GMAT Prep
- Replies: 4
- Views: 1147