Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Re: If x, y, and k are positive numbers such that 35x/(x-y) [#permalink]
03 Dec 2012, 10:53

1

This post received KUDOS

If number k such that k=35x/(x-y)+(70y-70x)/(x-y) for some positive numbers x and y, and if x>y, which of the following could be a value for k? -85 -75 -65 -35 -20 Explanation: First of all simplify expression for k: k=35x/(x-y)+(70y-70x)/(x-y)=(35x+70y-70x)/(x-y)=(70y-35x)/(x-y)=(35y+35y-35x)/(x-y)=35y/(x-y)-35 Since y>0 and x>y, 35y/(x-y)>0 or 35y/(x-y)-35>0-35 or k>-35. The answer is E.

Re: If x, y, and k are positive numbers such that 35x/(x-y) [#permalink]
20 Sep 2013, 17:27

1

This post received KUDOS

actleader wrote:

Hi! Could you help with the following... what is the best strategy? Thanx

If x, y, and k are positive numbers such that [35x][/(x-y)] +[(70y-70x)][/(x-y)]=k , and if x>y , which of the following could be a value for k?

(A) −85 (B) −70 (C) −65 (D) −35 (E) −20

The easiest way I found is K = 35/[1-Y/X] - 70 35/[1-Y/X] is always >35 [as the denominator is always between 0 and 1] therefore K>-35, hence K can only be -20

Re: If x, y, and k are positive numbers such that 35x/(x-y) [#permalink]
30 Oct 2012, 20:42

If x, y and k are all +ve numbers, how could k be any of the answer choices??. I can only get k>-35 and so only E satisfies the requirement. But even then, the requirement that k is a postive number is not satisfied.

Kudos Please... If my post helped. _________________

Did you find this post helpful?... Please let me know through the Kudos button.

Re: If x, y, and k are positive numbers such that 35x/(x-y) [#permalink]
30 Oct 2012, 20:47

MacFauz wrote:

If x, y and k are all +ve numbers, how could k be any of the answer choices??. I can only get k>-35 and so only E satisfies the requirement. But even then, the requirement that k is a postive number is not satisfied.

Kudos Please... If my post helped.

Yup, this question is posted second time on forum... and again its incorrect _________________

Re: If x, y, and k are positive numbers such that 35x/(x-y) [#permalink]
02 Nov 2012, 11:50

Vips0000 wrote:

MacFauz wrote:

If x, y and k are all +ve numbers, how could k be any of the answer choices??. I can only get k>-35 and so only E satisfies the requirement. But even then, the requirement that k is a postive number is not satisfied.

Kudos Please... If my post helped.

Yup, this question is posted second time on forum... and again its incorrect

I've brang the question up. Waiting for the GoGMAT answer.