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

primes and divisibility 2

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Legendary Member
Posts: 659
Joined: Mon Dec 14, 2009 8:12 amFollowed by: 3 members
Thanked: 32 times
by Gurpinder » Wed Aug 11, 2010 8:14 am
if y is an integer, is y^3 divisible by 9?

(1) y is divisible by 4
(2) y is divisible by 6

Again, I got the right answer but unsure of whether my approach is right. Please explain this.
“Do not confuse motion and progress. A rocking horse keeps moving but does not make any progress.”
- Alfred A. Montapert, Philosopher.
Top
Join the discussion
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 1460
Joined: Tue Dec 29, 2009 1:28 amFollowed by: 7 members
Thanked: 135 times

by selango » Wed Aug 11, 2010 8:24 am
stmt1,

y=4a

y^3=64*a^3

We don't know abt value of a.

Insuff

stmt2,

y=6a

y^3=216*a^3

y^3=24*a^3

Whatever value of a,y^3 is divisible by 9

Suff

Pick B
--Anand--
Top
Join the discussion
User avatar
Community Manager
Posts: 1048
Joined: Mon Aug 17, 2009 3:26 amFollowed by: 27 members
Location: India
Thanked: 51 times
GMAT Score:670

by arora007 » Wed Aug 11, 2010 8:27 am
Gurpinder wrote:if y is an integer, is y^3 divisible by 9?

(1) y is divisible by 4
(2) y is divisible by 6

Again, I got the right answer but unsure of whether my approach is right. Please explain this.

the answer is B,

if we were to solve it....
1) take y=4 the answer is No take y=12 the answer is yes so INSUFF
2) y=2*3*x so y^3 = 2*2*2*3*3*3*x^3 so its but natural that y^3 is divisible by 9.
https://www.skiponemeal.org/
https://twitter.com/skiponemeal
Few things are impossible to diligence & skill.Great works are performed not by strength,but by perseverance

pm me if you find junk/spam/abusive language, Lets keep our community clean!!
Top
Join the discussion