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Mod Query Important

I have two general queries in Modlus questions 1. When we say X < Y does that mean x-y < 0 or x/y < 1. In my view both are same . If not please let me know what the difference is and where we follow these different rules. 2. What is best approach to solve the questions when we have mod on both the s...

by CrackGMAC

Wed Nov 11, 2009 5:46 am
Forum: Problem Solving
Topic: Mod Query Important
Replies: 3
Views: 1436

Subsitution can take time here. What is the correct/ logical way of doing the question.

Thanks

by CrackGMAC

Thu Oct 29, 2009 8:54 am
Forum: Problem Solving
Topic: HELP PLS, STRANGE QUESTION
Replies: 5
Views: 1385

IMO 20. As in first case, I don't why thats incorrect.

by CrackGMAC

Thu Oct 29, 2009 8:45 am
Forum: Problem Solving
Topic: sum of all roots of the equation
Replies: 4
Views: 1646

Ans is C - 25.

Ratio of Women:Men:Childer = 25:10:22

by CrackGMAC

Thu Oct 29, 2009 8:27 am
Forum: Problem Solving
Topic: Data Sufficiency
Replies: 2
Views: 1151

Its D. Very simple.

f(x)= x^2(1-x)^2
f(1-x)=(1-x)^2 x^2

Hence, f(x)=f(1-x) for all x

by CrackGMAC

Wed Oct 28, 2009 6:33 am
Forum: Problem Solving
Topic: functions
Replies: 2
Views: 1267

Didn't got that? :(

by CrackGMAC

Wed Oct 28, 2009 6:31 am
Forum: Problem Solving
Topic: Ratio
Replies: 7
Views: 1639
by CrackGMAC

Wed Oct 28, 2009 6:14 am
Forum: Problem Solving
Topic: Short Cut: For solving such problems.
Replies: 8
Views: 1337

Sol : Here a=4 n=6 d=? Length of tree after 6 years would be a6 = a+(6-1)d => a6 = a+5d and after 4 years would be a4 = a+3d given a6 = 1/5 (a4)+a4 => a+5d = [1/5(a+3d)]+a+3d =>5a+25d = 6(a+3d) => 7d = a => d=4/7 Just a slight change in this. Initial height is 4 ft. So after one yr, is is 4+d after...

by CrackGMAC

Wed Oct 28, 2009 5:54 am
Forum: Problem Solving
Topic: AP question?
Replies: 7
Views: 1513

Ya there is a confusion b/w even and odd (factorial)numbers here coz as question it should be all (ans 19) and as per defination of n <n> = 8*6*4*2 it should be 23.

by CrackGMAC

Wed Oct 28, 2009 5:46 am
Forum: Problem Solving
Topic: How would you solve it?
Replies: 10
Views: 1503

pi (x)^2*32 = 288 pi

x= 3

Thickness = External R - Internal R = 5 - 3 =2

Am I right?

by CrackGMAC

Mon Oct 12, 2009 7:55 am
Forum: Problem Solving
Topic: Mensuration Prob #5
Replies: 9
Views: 1561

I am getting 4/5 as answer. 1/5 is for they will sit together.

Can you please confirm everything posted in correct

by CrackGMAC

Mon Oct 12, 2009 7:02 am
Forum: Problem Solving
Topic: Two couples
Replies: 2
Views: 1001

What does """" x ��" y """" mean?

by CrackGMAC

Mon Oct 12, 2009 6:38 am
Forum: Problem Solving
Topic: CAT #1 700-800 Level Question Recipriocal Averages
Replies: 5
Views: 4177

rohan_vus wrote:Not sure , i am taking a hit .

If 68 % fall within one standard deviation means 32 % are outside this . Since its symmetric around mean , so 32/2 = 16 % would be outside m + d .
It is B - 32%. You don't need to divide by 2. m+d is on both sides.

by CrackGMAC

Mon Oct 12, 2009 6:33 am
Forum: Problem Solving
Topic: Standard Deviation
Replies: 10
Views: 3217

Diitto aa2kash. 3/32

by CrackGMAC

Mon Oct 12, 2009 6:11 am
Forum: Problem Solving
Topic: Probability
Replies: 9
Views: 2995
by CrackGMAC

Thu Oct 08, 2009 1:35 am
Forum: Problem Solving
Topic: Set consisting of five different elements
Replies: 2
Views: 951