BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

If kmn <> 0 ....

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 109
Joined: Mon Oct 12, 2009 4:58 amFollowed by: 1 member
Thanked: 12 times
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.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pmFollowed by: 523 members
Location: Milpitas, CA
Thanked: 1854 times
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(m² + n² + k²) = xm + yn + zk? OR
xm² + xn² + xk² = xmm + ynm + zkm?
xn² + xk² = ynm + zkm?

(1) z/k = x/m
mz = xk
mzk = xk² but we do not know if xn² = ynm; NOT sufficient.

(2) x/m = y/n
nx = my
xn² = mny but we do not know if mzk = xk²; NOT sufficient.

Combining (1) and (2), we get xn² + xk² = 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/
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 109
Joined: Mon Oct 12, 2009 4:58 amFollowed by: 1 member
Thanked: 12 times
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?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1