Search found 61 matches
- by rishi235
Thu Aug 28, 2008 9:10 pm- Forum: Problem Solving
- Topic: Gmat Prep?? (Prob)
- Replies: 4
- Views: 3628
- by rishi235
Thu Aug 28, 2008 10:30 am- Forum: Data Sufficiency
- Topic: GMAT Prep?? (Arithmetic Sequence)
- Replies: 3
- Views: 1854
- by rishi235
Thu Aug 28, 2008 9:41 am- Forum: Data Sufficiency
- Topic: DS
- Replies: 5
- Views: 1898
- by rishi235
Thu Aug 28, 2008 9:35 am- Forum: Data Sufficiency
- Topic: DS
- Replies: 2
- Views: 1483
I'm getting A
Heres wat I did:
a^2 = b^2
=> a = +/-b
From stmt 1)
ab=0
=> a=0 or b=0...
=> So irrespective of the sign of b, a = b = 0...SUFFICIENT
Please tell me where I'm going wrong...
Thanks
- by rishi235
Thu Aug 28, 2008 9:04 am- Forum: Data Sufficiency
- Topic: DS
- Replies: 8
- Views: 1996
- by rishi235
Wed Aug 27, 2008 9:58 am- Forum: Problem Solving
- Topic: A cube of white chalk
- Replies: 8
- Views: 4314
Nice work...
Just to add to ur collection:
Sum of squares of 1st n consecutive natural nos = n(n+1)(2n+1) / 6
Sum of cubes of the 1st n consecutive natural nos. = [n(n+1)/2]^2
- by rishi235
Wed Aug 27, 2008 9:53 am- Forum: GMAT Math
- Topic: Formula for consecutive, even, odd integers
- Replies: 12
- Views: 658725
@ pepeprepa Why did u take pi*(r + s)??? It shud be pi*(r-s) The area of the shaded portion is Area of the entire circle - Area of the white portion Now radius of the white portion = r-s & not r+s So area of the shaded portion is pi*r^2 - pi*(r-s)^ U'll get the ans as E Hope u understood ur mist...
- by rishi235
Wed Aug 27, 2008 9:48 am- Forum: Problem Solving
- Topic: GMATPrep - area metal frame?
- Replies: 5
- Views: 1697
- by rishi235
Wed Aug 27, 2008 7:57 am- Forum: Problem Solving
- Topic: Gmat Prep(exponents)!!!
- Replies: 2
- Views: 1408
@ 4meonly... I guess ur assumption x=3*9^4 does not satisfy the 2nd condition Now x^x = y^2 => y = x^(x/2) => (3*9^4) ^ [(3*9^4)/2] => Now 3*9^4 / 2 is not an integer Hence Integer ^ Non-integer does not = Integer...so (3*9^4) ^ [(3*9^4)/2] is not an integer... Hence this does not satisfy the 2nd co...
- by rishi235
Tue Aug 26, 2008 8:40 am- Forum: Problem Solving
- Topic: Data Sufficiency
- Replies: 10
- Views: 1950
Confused yet again!!!
Hi... Why don't v take 8P4 here as the arrangement is important here? Also, on the other hand, if we take 8C4...i.e. v r selecting 4 DISTINCT balls from 8 balls...we do not need to re-arrange the balls in ascending as they r in ascending order...Ok got this but still the arrangement is important rig...
- by rishi235
Tue Aug 26, 2008 7:33 am- Forum: Problem Solving
- Topic: counting in arrangement
- Replies: 9
- Views: 1955
I also got the right answer using pepeprepa's method but took ages to get to the answer
U just gave us a great method sudhir....Thanks
- by rishi235
Mon Aug 25, 2008 10:11 am- Forum: Problem Solving
- Topic: TSD
- Replies: 10
- Views: 5494
oh i get my mistake ...Thanks 4meonly...
I solved the problem using mals24's method...got 720 too ... :roll:
- by rishi235
Mon Aug 25, 2008 9:52 am- Forum: Problem Solving
- Topic: Probability
- Replies: 15
- Views: 4899
Hi... I also got 7...which is the average of the no. of marbles.. But i do not think its the right answer... @ chase... I guess we need the find the least no. of marbles 'exchanged'... I just substituted the values as 0 , 5 , 9 & 14... So all the boys to have 7 marbles... we need to exchange 7+2...
- by rishi235
Mon Aug 25, 2008 9:46 am- Forum: Problem Solving
- Topic: Algebra
- Replies: 6
- Views: 1784
Wow....
I'm getting the answer as 1) 30....hehehe
Heres my working...
2C1 * 6C4 = 30...
Can't get it...
Thanks.... 
- by rishi235
Mon Aug 25, 2008 9:26 am- Forum: Problem Solving
- Topic: Probability
- Replies: 15
- Views: 4899