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 →

help

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 512
Joined: Mon Jun 18, 2012 11:31 pmFollowed by: 20 members
Thanked: 42 times
by sana.noor » Mon May 13, 2013 3:48 am
Which of the following CANNOT be a value of x when
y = x/(x-1) ?
(A) -2
(B) -1
(C) 0
(D) 1/3
(E) 1

OA is E
Work hard in Silence, Let Success make the noise.

If you found my Post really helpful, then don't forget to click the Thank/follow me button. :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 149
Joined: Wed May 01, 2013 10:37 pmFollowed by: 9 members
Thanked: 54 times

by Atekihcan » Mon May 13, 2013 5:16 am
As the denominator of the expression on the right-hand contains (x - 1), x cannot be equal to 1 as that will make y = 1/0 which is indeterminate.

Answer : E
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
MBA Admissions Consultant
Posts: 2279
Joined: Fri Nov 11, 2011 7:51 amFollowed by: 266 members
Location: New York
Thanked: 660 times
GMAT Score:770

by Jim@StratusPrep » Mon May 13, 2013 8:44 am
The denominator can never equal zero!
GMAT Answers provides a world class adaptive learning platform.
-- Push button course navigation to simplify planning
-- Daily assignments to fit your exam timeline
-- Organized review that is tailored based on your abiility
-- 1,000s of unique GMAT questions
-- 100s of handwritten 'digital flip books' for OG questions
-- 100% Free Trial and less than $20 per month after.
-- Free GMAT Quantitative Review

Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
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 May 13, 2013 9:33 am
"Fun" follow-up question:

Which of the following CANNOT be a value of y when y = x/(x-1) ?
(identify all correct answers)
(A) -2
(B) -1
(C) 0
(D) 1/3
(E) 1
(F) -1

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 149
Joined: Wed May 01, 2013 10:37 pmFollowed by: 9 members
Thanked: 54 times

by Atekihcan » Mon May 13, 2013 10:07 am
Brent@GMATPrepNow wrote:Which of the following CANNOT be a value of y when y = x/(x-1) ?
x > (x - 1)

Now, if (x - 1) > 0, i.e. x > 1 ---> x/(x - 1) > 1
And, if (x - 1) < 0, i.e. x < 1 ---> x/(x - 1) < 1

So, x/(x - 1) can never be equal to 1.

Answer : E
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
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 May 13, 2013 10:12 am
Atekihcan wrote:
Brent@GMATPrepNow wrote:Which of the following CANNOT be a value of y when y = x/(x-1) ?
x > (x - 1)

Now, if (x - 1) > 0, i.e. x > 1 ---> x/(x - 1) > 1
And, if (x - 1) < 0, i.e. x < 1 ---> x/(x - 1) < 1

So, x/(x - 1) can never be equal to 1.

Answer : E
Good stuff.
Another approach is to recognize that, in order for x/(x-1) to equal one, the numerator must equal the denominator. Since it's impossible for x to equal x-1, the expression can never equal 1.

Aside: I added the bit about identifying all correct answers to see if anyone would bite and select F as well.

Cheers,
Brent
Last edited by Brent@GMATPrepNow on Mon May 13, 2013 10:54 am, edited 2 times in total.
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 149
Joined: Wed May 01, 2013 10:37 pmFollowed by: 9 members
Thanked: 54 times

by Atekihcan » Mon May 13, 2013 10:52 am
Brent@GMATPrepNow wrote:Another approach is to recognize that, in order for x/(x-1) to equal zero...
You meant to say 'one', I guess.
Brent@GMATPrepNow wrote:Aside: I added the bit about identifying all correct answers to see if anyone would bite and select F as well.
B and F are same answer choice.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
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 May 13, 2013 10:57 am
Atekihcan wrote:
Brent@GMATPrepNow wrote:Another approach is to recognize that, in order for x/(x-1) to equal zero...
You meant to say 'one', I guess.

Good catch. I edited it accordingly
Brent@GMATPrepNow wrote:Aside: I added the bit about identifying all correct answers to see if anyone would bite and select F as well.
B and F are same answer choice.
Another nice catch!
I guess I should have another cup of coffee :-)

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1