Search found 11 matches
Hi Fabio, In this case if -1 is the lowest, then -1 could be largest also, so then the remaining terms could be existing or not existing also.. What do you think about this? No, allizzwell! The question stem says that -1 belongs to the set, and that for EVERY t element that is there (and -1 is cert...
- by jeetu_vishnoi
Tue Oct 26, 2010 3:20 am- Forum: Data Sufficiency
- Topic: Set theory with number system
- Replies: 9
- Views: 1857
Hi Fabio, Thanks for the reply but i have one query regarding your answer that question says that "A set of numbers" so there may be infinite numbers since no limit is given of the set. It never says that -1 is the first or lowest number then how can we say that -3 will not be in the set i...
- by jeetu_vishnoi
Mon Oct 25, 2010 2:55 pm- Forum: Data Sufficiency
- Topic: Set theory with number system
- Replies: 9
- Views: 1857
mean of the given S = (0+2+4+5+8+11)/6 = 5
to obtain the median arrange the S in ascending order S = {0,2,4,5,8,11}
now median is (4+5)/2 = 4.5
hence the difference between mean and median = 5 - 4.5 = 0.5
- by jeetu_vishnoi
Mon Oct 25, 2010 2:50 pm- Forum: Problem Solving
- Topic: how much greater..........
- Replies: 2
- Views: 1202
- by jeetu_vishnoi
Mon Oct 25, 2010 2:45 pm- Forum: Problem Solving
- Topic: which of the follwing must be true.........
- Replies: 4
- Views: 1170
Since cone is inscribed in a hemisphere conciding with the base of hemisphere then the height of the cone must be touching the side of hemisphere hence the height will be equal to the radius of the hemisphere and ratio is 1:1.
- by jeetu_vishnoi
Mon Oct 25, 2010 2:42 pm- Forum: Problem Solving
- Topic: Right circular cone question?
- Replies: 6
- Views: 3198
if we factorise 72 then it is 2*2*2*3*3
it is given that n2 is divisible by 72 hence if we make the above facorisation as square number then we have to multiply it by 2:
(2*2)(2*2)(3*3)
now from here you can see it easily that the largest number which can divide n is 2*2*3 = 12
- by jeetu_vishnoi
Mon Oct 25, 2010 2:31 pm- Forum: Problem Solving
- Topic: BTG 300 unclear solution
- Replies: 7
- Views: 1516
In these type of question you can only select a given condition as true iff it is always true. If there is even a single condition in which it can be false then you can not choose this condition as sufficient. In the given question you can see that in the first condition, required number will always...
- by jeetu_vishnoi
Mon Oct 25, 2010 2:25 pm- Forum: Problem Solving
- Topic: GMATprep question
- Replies: 5
- Views: 1376
if bigger rim revolves y times per seconds then according to the given condition:
2*pi*28*x = 2*pi*35*y
y = .8x
now we need to give the total revolution per minute hence answer = 60*(.8x) = 48x
- by jeetu_vishnoi
Mon Oct 25, 2010 2:18 pm- Forum: Problem Solving
- Topic: Circular rim
- Replies: 8
- Views: 5322
Answer is A. first equation can be written as (x-3)(x-1)<0 which means that (x-3)<0 and (x-1)>0 it shows that x<3 and x>1 and it is given that x is integer hence x=2. first equation can be written as (x+3)(x+1)<0 which means that either {(x+3)<0 and (x+1)<0} or {(x+3)>0 and (x+1)>0} which clearly sh...
- by jeetu_vishnoi
Mon Oct 25, 2010 2:11 pm- Forum: Data Sufficiency
- Topic: Gmat practice question
- Replies: 9
- Views: 2086
- by jeetu_vishnoi
Mon Oct 25, 2010 2:02 pm- Forum: Data Sufficiency
- Topic: computer and printers
- Replies: 7
- Views: 4075
Set theory with number system
A set of numbers has the property that for any number t in the set, t+2 is in the set. If -1 is in the set, which one of the following must also be in the set?
i. -3
ii. 1
iii. 5
(A) i only
(B) ii only
(C) i and ii only
(D) ii and iii only
(E) i, ii and iii
- by jeetu_vishnoi
Mon Oct 25, 2010 1:58 pm- Forum: Data Sufficiency
- Topic: Set theory with number system
- Replies: 9
- Views: 1857