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

Redeem

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.

★★★★★5.0559 reviews
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
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
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start 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 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Unable to solve this ds question

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 283
Joined: Sun Jun 23, 2013 11:56 pmFollowed by: 26 members
Location: Bangalore, India
Thanked: 97 times
GMAT Score:750

by ganeshrkamath » Mon Aug 19, 2013 12:35 am
Mayank Choudhary wrote:Is z an even Number?
1. 3z is even
2. 5z is even
1. z can be a fraction or an even number
(z = 2/3 => 3z = 2
z = 2 => 3z = 6)
Not sufficient

2. same reason
(z = 2/5 => 5z = 2
z = 2 => 5z = 10)
Not sufficient

Combination of the 2 statements: 3z and 5z are even
=> 2z is even
Since 2z and 3z are even, z has to be even.

Is it C?
Every job is a self-portrait of the person who did it. Autograph your work with excellence.

Kelley School of Business (Class of 2016)
GMAT Score: 750 V40 Q51 AWA 5 IR 8
https://www.beatthegmat.com/first-attemp ... tml#688494
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 234
Joined: Tue Jul 16, 2013 9:00 am
Location: West Virginia
Thanked: 9 times

by Java_85 » Mon Aug 19, 2013 2:48 pm
I agree with your solution, but I just don't get it why if 3z and 5z are both even, z should be even?

ganeshrkamath wrote:
Mayank Choudhary wrote:Is z an even Number?
1. 3z is even
2. 5z is even
1. z can be a fraction or an even number
(z = 2/3 => 3z = 2
z = 2 => 3z = 6)
Not sufficient

2. same reason
(z = 2/5 => 5z = 2
z = 2 => 5z = 10)
Not sufficient

Combination of the 2 statements: 3z and 5z are even
=> 2z is even
Since 2z and 3z are even, z has to be even.

Is it C?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Sun Aug 18, 2013 10:59 pm

by Mayank Choudhary » Mon Aug 19, 2013 4:41 pm
thank u guys but i dont get how combination of 2 statements make 2 it can make 8 or 15 to
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Mon Aug 19, 2013 6:46 pm
If z is a positive number, is z an even integer?

(1) 3z is an even integer.

(2) 5z is an even integer.
Statement 1: 3z is even.
It's possible that z = 2, which is an even integer.
It's possible that z = 2/3, which is not an even integer.
INSUFFICIENT.

Statement 2: 5z is even.
It's possible that z = 2, which is an even integer.
It's possible that z = 2/5, which is not an even integer.
INSUFFICIENT.

Every test-taker should know the following:
EVEN - EVEN = EVEN.

Statements 1 and 2 combined:
Here, 5z is even and 3z is even.
Thus:
5z-3z = even - even = even.
Since 5z-3z = 2z, 2z must be even.

Since 3z is even and 2z is even, we get:
3z-2z = even - even = even.
Since 3z-2z = z, z must be even.
SUFFICIENT.

The correct answer is C.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1