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.

DS-number

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 1309
Joined: Mon Apr 04, 2011 5:34 amFollowed by: 123 members
Location: India
Thanked: 310 times
GMAT Score:750

by cans » Thu Sep 15, 2011 9:02 pm
N-> perfect square??
A) Not square. (perfect square has odd number of distinct factors)
Sufficient
B) sum of all distinct=even.
3:1,3 (even)
36:1,2,3,6,12,18,36 (even) insufficient
IMO A
If my post helped you- let me know by pushing the thanks button ;)

Contact me about long distance tutoring!
[email protected]

Cans!!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 14
Joined: Wed Mar 30, 2011 7:36 am

by jogi1984 » Thu Sep 15, 2011 9:20 pm
The answer mentioned was D :(
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 496
Joined: Tue Jun 07, 2011 5:34 amFollowed by: 1 member
Thanked: 38 times

by sl750 » Fri Sep 16, 2011 9:10 am
36 1*36
2*18
3*12
4*9
6*6
The sum of distinct factors is odd, not even. D is correct
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 » Fri Sep 16, 2011 9:32 am
I posted a solution here:

https://www.beatthegmat.com/mgmat-question-t81790.html
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
User avatar
Junior | Next Rank: 30 Posts
Posts: 25
Joined: Fri Jul 22, 2011 5:09 am
Thanked: 1 times

by HeintzC2 » Fri Sep 16, 2011 12:03 pm
3 is not a perfect square.
cans wrote:N-> perfect square??
A) Not square. (perfect square has odd number of distinct factors)
Sufficient
B) sum of all distinct=even.
3:1,3 (even)
36:1,2,3,6,12,18,36 (even) insufficient
IMO A
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 87
Joined: Sun Jul 24, 2011 10:36 am

by [email protected] » Fri Sep 16, 2011 3:35 pm
cans wrote:N-> perfect square??
A) Not square. (perfect square has odd number of distinct factors)
Sufficient
B) sum of all distinct=even.
3:1,3 (even)
36:1,2,3,6,12,18,36 (even) insufficient
IMO A
CANS, I THINK THE ANSWER SHOULD BE D
IN YOUR OPTION B YOU FORGET TO COUNT NUMBER 4 AND 9. THEY ARE ALSO THE FACTORS OF 36. THE SUM OF 4+9 IS ODD. THUS AS PER YOUR EXPLANATION. THIS WILL BE THE SUM ODD
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 608
Joined: Sun Jun 19, 2011 11:16 amFollowed by: 8 members
Thanked: 37 times

by saketk » Sun Sep 18, 2011 5:25 am
jogi1984 wrote:Is the positive integer N a perfect square?

(1) The number of distinct factors of N is even.
(2) The sum of all distinct factors of N is even.
two basic things to remember --

1) the numbers of distinct factors of 'PERFECT SQUARES' are ALWAYS Odd..

consider this -- 4 -- 2^2 , number of factor = (2+1) = 3
36 = 2^2*3^2 , number of factors = (2+1) (2+1) =9

2) the sum of all distinct factors of a number is calculated this way

I always use my favorite number - 28 (this is the 2nd PERFECT NUMBER, first being 6)
28 = (2^2)(7^1)
sum of factors = (1 + 2 + 4)(1 + 7) = (7)(8) = 56 [EVEN]

So, using these 2 points you can solve this question. and yeah the answer should be D
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 158
Joined: Wed Jun 16, 2010 8:21 amFollowed by: 1 member
Thanked: 13 times

by rohit_gmat » Sun Sep 18, 2011 7:34 am
cans wrote:36:1,2,3,6,12,18,36 (even)
thts 7 numbers thr cans... thts odd :P
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1