If kmn <> 0 ....

Target Test Prep's 2024 GMAT Focus Edition prep is discounted for the BTG community!

Redeem

5-Day Free Trial

5-day free, full-access trial TTP

Available with Beat the GMAT members only code

MORE DETAILS

Magoosh

Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

MORE DETAILS

This topic has expert replies

Post new topic Post Reply

Previous Topic Next Topic

jeffedwards: Master | Next Rank: 500 Posts; Posts: 109; Joined: Mon Oct 12, 2009 4:58 am; Thanked: 12 times; Followed by:1 members; GMAT Score:720

If kmn <> 0 ....

by jeffedwards » Tue Dec 27, 2011 10:12 pm

See screenshot. I'm not sure how to solve this in less than 2 minutes.

Attachments

Quote

jeffedwards: Master | Next Rank: 500 Posts; Posts: 109; Joined: Mon Oct 12, 2009 4:58 am; Thanked: 12 times; Followed by:1 members; GMAT Score:720

by jeffedwards » Tue Dec 27, 2011 10:21 pm

I can unravel this in about four and a half minutes, but that wont work on the real test.

Quote

GMAT/MBA Expert

Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pm; Location: Milpitas, CA; Thanked: 1854 times; Followed by:523 members; GMAT Score:770

by Anurag@Gurome » Tue Dec 27, 2011 10:28 pm

jeffedwards wrote:See screenshot. I'm not sure how to solve this in less than 2 minutes.

The question is: Is x/m(mÂ² + nÂ² + kÂ²) = xm + yn + zk? OR
xmÂ² + xnÂ² + xkÂ² = xmm + ynm + zkm?
xnÂ² + xkÂ² = ynm + zkm?

(1) z/k = x/m
mz = xk
mzk = xkÂ² but we do not know if xnÂ² = ynm; NOT sufficient.

(2) x/m = y/n
nx = my
xnÂ² = mny but we do not know if mzk = xkÂ²; NOT sufficient.

Combining (1) and (2), we get xnÂ² + xkÂ² = ynm + zkm; SUFFICIENT.

The correct answer is C.

Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/

Quote

jeffedwards: Master | Next Rank: 500 Posts; Posts: 109; Joined: Mon Oct 12, 2009 4:58 am; Thanked: 12 times; Followed by:1 members; GMAT Score:720

by jeffedwards » Tue Dec 27, 2011 10:54 pm

Thanks that's pretty good. Any tips on ways to spot the best way to move the variables around...or does that just come with practice?

Quote

Post new topic Post Reply

• Page 1 of 1

5/5

5 Star (483 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