Work - m machines - The Beat The GMAT Forum - Expert GMAT Help & MBA Admissions Advice

Work - m machines

Expert replies

GMAT/MBA Expert

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Mon Feb 16, 2009 3:11 pm

Please note that this is not an official GMAT question; it’s my attempt to create difficult (650+ level) GMAT-style questions for this forum.

Brent Hanneson - Creator of GMATPrepNow.com

Like this post

Source: Beat The GMAT — Problem Solving | Mon Feb 16, 2009 3:11 pm

tini: Junior | Next Rank: 30 Posts; Posts: 27; Joined: Sat Dec 29, 2007 1:37 amFollowed by: 1 member; Thanked: 2 times

by tini » Mon Feb 16, 2009 3:59 pm

m machines work m hrs and finish in m days
m machines work 1 hr and finish in m*m days
1 machine works 1 hr and finish in m*m*m days
k machine work 1 hr and finish in (m^3)/k days
k machine work k hrs and finish in (m^3)(k^2) days

is this the answer?

Like this post

GMAT/MBA Expert

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Mon Feb 16, 2009 4:05 pm

tini wrote:m machines work m hrs and finish in m days
m machines work 1 hr and finish in m*m days
1 machine works 1 hr and finish in m*m*m days
k machine work 1 hr and finish in (m^3)/k days
k machine work k hrs and finish in (m^3)(k^2) days

is this the answer?

If you meant (m^3)/(k^2) days, then you are correct.

My solution is similar:

Brent Hanneson - Creator of GMATPrepNow.com

Like this post

GMAT/MBA Expert

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Mon Feb 16, 2009 4:07 pm

Another option is to assign m and k values, determine the numerical answer, and then see which answer choice yields the same value.

Brent Hanneson - Creator of GMATPrepNow.com

Like this post

tini: Junior | Next Rank: 30 Posts; Posts: 27; Joined: Sat Dec 29, 2007 1:37 amFollowed by: 1 member; Thanked: 2 times

by tini » Mon Feb 16, 2009 5:08 pm

yes. i missed out the slash.a typo.

Like this post

griscomtestprep: Junior | Next Rank: 30 Posts; Posts: 27; Joined: Sat Feb 07, 2009 6:14 pmFollowed by: 1 member; Location: Las Vegas, NV; Thanked: 7 times; GMAT Score:760

by griscomtestprep » Tue Feb 17, 2009 12:17 am

work = work
m*m*m=k*k*x
x=m^3/k^2

Free Hour of Live Online GMAT Training
Griscom Test Prep
www.griscomtestprep.net
[email protected]
702-406-7688

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review