Search found 51 matches
- by anksgupta
Sat Jun 27, 2009 4:26 am- Forum: Critical Reasoning
- Topic: oxygen gmatprep2
- Replies: 13
- Views: 2300
- by anksgupta
Fri Jun 26, 2009 12:53 pm- Forum: Problem Solving
- Topic: SD good Q
- Replies: 9
- Views: 1810
SD good Q
A set of data consists of the following 5 numbers : {0,2,4,6,8}
What 2 no.s if added to create a set of 7, will result in SD that is closest to the SD for set of 5 original nos.
1. -1,9
2. 4,4
3. 3,5
4. 2,6
5. 0,8
- by anksgupta
Fri Jun 26, 2009 6:04 am- Forum: Problem Solving
- Topic: SD good Q
- Replies: 9
- Views: 1810
- by anksgupta
Thu Jun 25, 2009 12:19 am- Forum: Data Sufficiency
- Topic: GMAT Prep 2
- Replies: 4
- Views: 1391
IMO C from 1, x-y=.5 Picking nos x-=-.5 and y=-1 or x=1 and y=.5 Hence not sufficient from 2, x/y>1 => sign of both x and y are same and |x|>|y| picking no, x=-3, y=-2 or x=3,y=2, both satisfy, hence not sufficient combining, since x-y=+ve no, hence x>y so we cannot have both nos as negative and the...
- by anksgupta
Wed Jun 24, 2009 11:57 pm- Forum: Data Sufficiency
- Topic: GMAT Prep
- Replies: 3
- Views: 1407
- by anksgupta
Wed Jun 24, 2009 2:28 am- Forum: Sentence Correction
- Topic: GMAT prep honeybee
- Replies: 4
- Views: 1314
For your 2nd query, Vavg = Total Distance/Total Time
V_avg = 2D/(D/U+D/V) = 2/(1/U+1/V)
=> 2/V_avg=1/U+1/V => V=2UV/(U+V)
- by anksgupta
Mon Jun 22, 2009 10:08 am- Forum: Problem Solving
- Topic: Boat in Stream
- Replies: 6
- Views: 5564
For your 2nd query, Vavg = Total Distance/Total Time
V_avg = 2D/(D/U+D/V) = 2/(1/U+1/V)
=> 2/V_avg=1/U+1/V => V=2UV/(U+V)
- by anksgupta
Mon Jun 22, 2009 8:54 am- Forum: Problem Solving
- Topic: Boat in Stream
- Replies: 6
- Views: 5564
- by anksgupta
Sun Jun 21, 2009 8:15 am- Forum: Sentence Correction
- Topic: distinctive hereditary tartans
- Replies: 7
- Views: 4419
- by anksgupta
Sun Jun 21, 2009 3:22 am- Forum: Critical Reasoning
- Topic: oxygen gmatprep2
- Replies: 13
- Views: 2300
- by anksgupta
Sun Jun 21, 2009 3:00 am- Forum: Sentence Correction
- Topic: gmatprep2
- Replies: 9
- Views: 1902
1. C as individualy we dont know about either greatest height or range. combined we know that since greatest hieght of A is more and it has smaller range so least height of A ought to be greater than that of B 2. D in stem 2 it is saying on avg more than 9 mins are required to cover the distance so ...
- by anksgupta
Fri Jun 19, 2009 10:08 pm- Forum: Data Sufficiency
- Topic: Range of heights
- Replies: 2
- Views: 3965
IMO C is right.
YOu need to have 2 equation to solve for a and b
From 1. what if a=4 and b=0 . hence 1. is not enough
using both 1 and 2 , a and b can be calcualted hence C
- by anksgupta
Fri Jun 19, 2009 10:01 pm- Forum: Data Sufficiency
- Topic: What is the value of a^4-b^4
- Replies: 4
- Views: 3209
A still quicker approach is to use synthetic division for polynomials
http://www.purplemath.com/modules/synthdiv.htm
- by anksgupta
Fri Jun 19, 2009 6:59 pm- Forum: Problem Solving
- Topic: Algebra -
- Replies: 9
- Views: 1831
IMO D
'After' along with 'since' seems awkward in A,B abd E
also B uses were the former East Germans which is wrong as we are talkin bout 1 grp. Had been is not required in A and E
As since 1989 is used, we need continuation hence 'has been' is better than 'was' so IMO C is not correct.
- by anksgupta
Fri Jun 19, 2009 10:02 am- Forum: Sentence Correction
- Topic: MGMAT test 4 SC
- Replies: 4
- Views: 2304