Search found 134 matches


2 Part question- Max., & Min. value of function!

Hello Friends! Try this question... The function f(x,y) is such that f(x,y) = x^2.y^3 & x+y =25. Where x, & y are non-negative integers. Select one minimum possible, & one maximum possible value for f(x,y). Make only two selections, one in each column. https://s16.postimage.org/4vagrsbpt/2_Part_Qn.j...


what is the value of x? 1. x^3-x^2=0 2. (-x)^2= -x^2 i feel the correct answer is A, and x is either 1 or 0, could someone please explain this to me. thanks in advance As per Statement 1- x=0 or 1. Not sufficient. Let's see statement 2. In the equation (-x)^2= -x^2, LHS is a +ive term, while RHS is...

by Shalabh's Quants

Fri Sep 07, 2012 7:23 am
Forum: Data Sufficiency
Topic: Value of X
Replies: 5
Views: 943

everything's eventual wrote:I think that the problem states that both x and y are even positive integers. In this case the answer is (d) : (i) and (iii) only
(iii) is not necessarily an even. Take x=6, then x/2 would be Odd.

by Shalabh's Quants

Fri Sep 07, 2012 7:15 am
Forum: Problem Solving
Topic: Help me solv this?
Replies: 5
Views: 866

Any clarification on how to do this would be great. On a certain scale of intensity, each increment of 10 in magnitude represents a tenfold increase in intensity. On this scale, an intensity corresponding to a magnitude of 165 is how many times an intensity corresponding to a magnitude of 125? (A) ...

by Shalabh's Quants

Fri Sep 07, 2012 7:09 am
Forum: Problem Solving
Topic: tenfold
Replies: 3
Views: 1889

neelgandham wrote:A beats C by 50 yards and
B beats D by ~35 yards.

I will post a step-by-step solution in a bit.

Shalabh - I see that you are now a member of e-GMAT family. Congratulations!
Thank you Anil.

by Shalabh's Quants

Fri Sep 07, 2012 7:03 am
Forum: Problem Solving
Topic: 2 Part question!
Replies: 2
Views: 686

2 Part question!

Hello friend, Pl. try this 2 part question... A can beat B in a 400 yards race by 60 yards, B can beat C in a 850 yards race by 100 yards, & C can beat D in a 600 yards race by 40 yards. Select the values of 'A beats C',&'B beats D' by yards in a 200 yards race in the table that are consistent with ...

by Shalabh's Quants

Fri Sep 07, 2012 5:33 am
Forum: Problem Solving
Topic: 2 Part question!
Replies: 2
Views: 686

How much tea worth 0.93$ per pound must be mixed with tea worth $0.75 per pound to produce 10 pounds worth $0.85 per pound? 1) 2 2/9 2) 3 1/2 3) 4 4/9 4) 5 5/9 5) 9 1/2 OA is D Well one of the short cut approach could be like this. There are 2 kinds of Tea- $0.93/pound, & $0.75/pound to make $0.85/...

by Shalabh's Quants

Fri Sep 07, 2012 5:10 am
Forum: Problem Solving
Topic: Mixture
Replies: 6
Views: 1504

If a and b are integers, and |a| > |b|, is a · |b| < a – b? (1) a < 0 (2) ab greater than or equal to 0 Anyone want to help me clarify this question. OA is E. I initially chose C. Thanks Statement 1 only.... Lets' take couple of values that satisfy |a| > |b|. These could be.. 1. a=8, & b=2 2. a=...

by Shalabh's Quants

Tue Jul 17, 2012 6:29 am
Forum: Data Sufficiency
Topic: Hard DS Question- M-GMAT Problem
Replies: 5
Views: 964

A certain rectangular crate measures 08 feet by 10 feet by 12 feet. A cylindrical gas tank is to be made for shipment in the crate and will stand upright when the crate is placed in one of its six faces. What should the radius of the tank be if it is to be of the largest possible volume? 1. 4 2. 5 ...

by Shalabh's Quants

Tue Jul 17, 2012 6:09 am
Forum: Problem Solving
Topic: Rectangular Crate
Replies: 2
Views: 859

Initially, there are 32 people in a room, with a ratio of 5 men for every 3 women. 18 men leave, and the number of women in the room then diminishes, so that the number of women in the room is equal to twice the number of men in the room. In order to have a 2 : 1 ratio of men to women in the room, ...

by Shalabh's Quants

Wed Jul 11, 2012 1:35 am
Forum: Problem Solving
Topic: Ratio
Replies: 2
Views: 1377

3 machines have a productivity ratio of 1:2:5. all 3 machines are working on a job for 3 hours. at the beginning of the 4th hour, the slowest machine breaks. it is fixed at the beginning at hour 7, and begins working again. the job is done in 9 hours. what was the ratio of the work performed by the...

by Shalabh's Quants

Wed Jul 11, 2012 1:14 am
Forum: Problem Solving
Topic: Ratio and proportion
Replies: 3
Views: 717
by Shalabh's Quants

Wed May 16, 2012 10:58 pm
Forum: Problem Solving
Topic: Modulus PS
Replies: 21
Views: 4803

Thank you for the response... I still go with A as the answer and this is the reason: After finding the constraints, the question boils down to -1<x<0 and x>1. There is a shady region between 0 and 1 that does not support x/|x|<x. to prove the point, plug 1/2 as x. (1/2)/(1/2)=1 which is not less t...

by Shalabh's Quants

Wed May 16, 2012 12:45 pm
Forum: Problem Solving
Topic: Modulus PS
Replies: 21
Views: 4803

If x and y are integers, what is the remainder when x^2 + y^2 is divided by 5? 1) When x-y is divided by 5, the remainder is 1 2) When x+y is divided by, the remainder is 2 OA C As is clear that from Statement 1 and 2 that by alone, we cannot infer the result. So Lets combine. To make the calculati...

by Shalabh's Quants

Wed May 16, 2012 10:55 am
Forum: Data Sufficiency
Topic: x^2 + y^2 divided by 5
Replies: 11
Views: 6407

Thank you for the response... I still go with A as the answer and this is the reason: After finding the constraints, the question boils down to -1<x<0 and x>1. There is a shady region between 0 and 1 that does not support x/|x|<x. to prove the point, plug 1/2 as x. (1/2)/(1/2)=1 which is not less t...

by Shalabh's Quants

Wed May 16, 2012 10:28 am
Forum: Problem Solving
Topic: Modulus PS
Replies: 21
Views: 4803