Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Section 1 / Q 20 in 1000PS

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Tue May 29, 2007 10:36 pm
by priyasom » Thu Jan 31, 2008 7:46 pm
If y ≠ 3 and 3x/y is a prime integer greater than 2, which of the following must be true?
I. x = y
II. y = 1
III x and y are prime integers.

(A) None
(B) I only
(C) II only
(D) III only
(E) I and III

OA is (A)
Can someone explain why I ( x= y) is not true?

Thanks
Top
Join the discussion
Source: — Problem Solving |
User avatar
GMAT Instructor
Posts: 3224
Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members
Location: Toronto
Thanked: 1710 times
GMAT Score:800

Re: Section 1 / Q 20 in 1000PS

by Stuart@KaplanGMAT » Thu Jan 31, 2008 8:02 pm
priyasom wrote:If y ≠ 3 and 3x/y is a prime integer greater than 2, which of the following must be true?
I. x = y
II. y = 1
III x and y are prime integers.

(A) None
(B) I only
(C) II only
(D) III only
(E) I and III

OA is (A)
Can someone explain why I ( x= y) is not true?

Thanks
If we pick x= -5 and y= -3, we get 3(-5)/(-3) = 5. So, x doesn't have to equal y.
Image

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 171
Joined: Sat May 03, 2008 3:51 pm
Thanked: 8 times

by wawatan » Tue May 20, 2008 5:24 pm
What is wrong with option III? anyone? how do you plug in numbers for this?
Top
Join the discussion
Legendary Member
Posts: 631
Joined: Mon Feb 18, 2008 11:57 pmFollowed by: 3 members
Thanked: 29 times

by netigen » Tue May 20, 2008 10:16 pm
x and y can be both negative for e.g. x=-7 and y=-3 hence not prime

or x and y can be both equal for e.g. x=4 and y=4 and may or may not be prime
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 171
Joined: Sat May 03, 2008 3:51 pm
Thanked: 8 times

by wawatan » Wed May 21, 2008 12:52 am
thanks! for some reason, i forgot that prime numbers are positive numbers...but i looked it up on wikipedia. great explanation. also for plugging in numbers if the question says x and y ....then x can equal y when you plug in numbers? or you have to plug in different numbers because its different letters?
Top
Join the discussion
GMAT Instructor
Posts: 85
Joined: Thu May 01, 2008 12:56 pm
Location: Salt Lake City, UT
Thanked: 24 times
GMAT Score:750+

by VP_RedSoxFan » Wed May 21, 2008 2:18 am
From what I can tell, to make 3x/y prime and have y not equal to 3, y has to be either x, 1 or -3. The allowance for x and y (at the same time, only) to be negative is what makes III not necessarily true.
Ryan S.
| GMAT Instructor |
Elite GMAT Preparation and Admissions Consulting
www.VeritasPrep.com

Learn more about me
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 171
Joined: Sat May 03, 2008 3:51 pm
Thanked: 8 times

by wawatan » Wed May 21, 2008 11:37 am
VP_REdsoxfan---are you saying that x and y could be the same number when you plug in numbers in all data sufficiency scenarios or just this scenario?
Top
Join the discussion