Search found 27 matches


Let me be a little more specific about my request. I'm looking for some good practice material or strategy material on problems relating to situations where we have a set of S people and out of of them a group of G1 people does something and a group G2 people does something else. We are needed to fi...

by anirban_lax

Fri Sep 10, 2010 6:37 am
Forum: Problem Solving
Topic: Problems related to sets and groups
Replies: 2
Views: 791

Thanks Sanju! Appreciate your help!

E is indeed the OA.

I thought its C as I assumed P(WE) = P(W).P(E). Now that I rethink that has to be a wrong assumption as P(W) and P(E) are not inependent sets - a ball which is white can have even numbers written on it and thus they cannot be independent.

by anirban_lax

Fri Sep 10, 2010 6:27 am
Forum: Data Sufficiency
Topic: GMATPrep : On principles of probability
Replies: 4
Views: 871

..and I came in thinking this might be an interesting Word Problem. @Brick7 We understand that essay writing can be a huge challenge for many but it's a problem that a maths forum won't be able to help you with. I don't know what you were thinking when you put this post in here. Dear Mr. Moderator -...

by anirban_lax

Thu Sep 09, 2010 9:37 pm
Forum: Problem Solving
Topic: Best Job of Software Developer
Replies: 7
Views: 1153

GMATPrep : On principles of probability

Another one from the GMATPrep stable: Thought I got it right ...but alas! I'm eager to know where I went wrong and would appreciate if you can please help me understand the solution. Each of the 25 balls in a certain box is either red, blue or white and has a number from 1 to 10 paintedo n it. If on...

by anirban_lax

Thu Sep 09, 2010 9:18 pm
Forum: Data Sufficiency
Topic: GMATPrep : On principles of probability
Replies: 4
Views: 871

Ahhhh! I was so close and yet so far.

Thanks a lot for your help! C is indeed the OA.

by anirban_lax

Thu Sep 09, 2010 8:42 pm
Forum: Data Sufficiency
Topic: GMATPrep : A simple yet confusing DS question on numbers
Replies: 10
Views: 1162

GMATPrep : A simple yet confusing DS question on numbers

Hi I encountered this problem in course of a practice test and was very confident of my answer till I saw the official answer. Here it is: Are x and y both positive? a) 2x - 2y =1 b) x/y > 1 I'm curious to know if someone gets the same answer as mine and hence I'll share the OA later. Thanks Anirban

by anirban_lax

Thu Sep 09, 2010 7:55 pm
Forum: Data Sufficiency
Topic: GMATPrep : A simple yet confusing DS question on numbers
Replies: 10
Views: 1162

checking the answer you gave gives us a quadrilateral and an octagon, 4 sides and 8 sides, which should have 360 and 1080 as interior angles. doesn't work. in fact, as written, I don't think there is a solution to the problem that is positive, provided the rule for interior angles of a polygon foll...

by anirban_lax

Thu Sep 09, 2010 7:22 pm
Forum: Problem Solving
Topic: geometry:regular polygons
Replies: 4
Views: 2915

That's a useful piece of info! Where do I get to see the version? I checked the readme file it doesn't have any.
It would be great if you can mention where to find each version.

by anirban_lax

Thu Sep 09, 2010 6:54 pm
Forum: GMAT Strategy
Topic: Two version of GMATprep
Replies: 2
Views: 1371

Great explanation Brian! Can't thank you enough!

Stuart - thank you. That is surely an useful bit of info...I can check on a few alternative ways of tackling this problem.

Appreciate your help guys!

regards
Anirban

by anirban_lax

Thu Sep 09, 2010 6:16 pm
Forum: Problem Solving
Topic: GMATPrep : Find the smallest prime factor
Replies: 3
Views: 1906

GMATPrep : Find the smallest prime factor

Hi Please help me understand the solution to this problem that I encountered in GMATPrep Practice Test 1. For every positive even integer n there is a function h(n) which is defined as a product of all even integers from 2 to n. What is the smallest prime factor of h(100) + 1? 1. between 2 and 10 2....

by anirban_lax

Thu Sep 09, 2010 3:01 pm
Forum: Problem Solving
Topic: GMATPrep : Find the smallest prime factor
Replies: 3
Views: 1906

Problems related to sets and groups

Hi Does anyone know of any good practice material for problems relating to groups and sets (). I'm having a torrid time with this type and spending way too much time in solving them during the practice tests. The D-day is coming close...20 days to go. Can you please help me out and point me to some ...

by anirban_lax

Thu Sep 09, 2010 8:23 am
Forum: Problem Solving
Topic: Problems related to sets and groups
Replies: 2
Views: 791

Ah! I see it now! Awesome!

Can't help but click the Thanks button twice for your 2 replies on this post :) Thanks a lot!

by anirban_lax

Tue Aug 10, 2010 9:03 am
Forum: Problem Solving
Topic: GMATPrep Test 1 - Surds problem
Replies: 5
Views: 2251

The answer should be 66. Here's how: In solving this kind of problems we should consider the worst case scenario, i.e. what will make me draw more balls out of the jar or what will delay my process of getting 23 balls of the same color. Note that we have only 21 white balls and hence can never have ...

by anirban_lax

Tue Aug 10, 2010 9:00 am
Forum: Problem Solving
Topic: 21 white balls, 24 green balls and 32 blue balls
Replies: 4
Views: 1020

Thanks Rahul!

That's an elegant solution!

I was wondering if there is a way to solve this if I do not know the value of 2^1/3, or for that matter if we have a number whose cube root is not well known.

by anirban_lax

Tue Aug 10, 2010 8:41 am
Forum: Problem Solving
Topic: GMATPrep Test 1 - Surds problem
Replies: 5
Views: 2251

A = [2,4,6,8,10,12,14,16,18] B = [9,18] C = [13,15,17,19] 9+2+4=15 Although the answer choice is correct, I think there are a couple of mistakes in the solution! Here's my 2 cents worth! In set B, you've considered 18, which is not an odd multiple of 9 and thus doesn't belong to this set. Hence, B ...

by anirban_lax

Tue Aug 10, 2010 8:37 am
Forum: Problem Solving
Topic: How many positive integers less than 20 are ?
Replies: 5
Views: 14125