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 →

Is n/15 an integer?

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 1161
Joined: Mon May 12, 2008 2:52 amFollowed by: 1 member
Location: Sydney
Thanked: 23 times
by mehravikas » Mon Jun 02, 2008 2:40 am
S5-25 If n is an integer, is n/15 an integer?

(1) 3n/15 is an integer.
(2) 8n/15 is an integer.


I have solved this question, but I just want to validate my approach. Please post an answer with an explanation.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
Master | Next Rank: 500 Posts
Posts: 294
Joined: Tue Feb 26, 2008 9:05 pmFollowed by: 1 member
Thanked: 13 times

by amitansu » Mon Jun 02, 2008 3:24 am
B is ans here.

From 1: 3n/15 is an integer =>n is divisible by 5.That doesn't definitely say n is also divisible by 15.Insufficient.

From 2: 8n/15 is an integer=>8n should be divisible by 15 by saying that we have to see , whether 8 multiplied any no. should be a multiple of 15.
Only way it is as, when n itself is multiple of 15. Chk it by plugin values.
So sufficient.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1161
Joined: Mon May 12, 2008 2:52 amFollowed by: 1 member
Location: Sydney
Thanked: 23 times

by mehravikas » Tue Jun 03, 2008 2:54 am
Bingo !! I thought same as you did :-)
amitansu wrote:B is ans here.

From 1: 3n/15 is an integer =>n is divisible by 5.That doesn't definitely say n is also divisible by 15.Insufficient.

From 2: 8n/15 is an integer=>8n should be divisible by 15 by saying that we have to see , whether 8 multiplied any no. should be a multiple of 15.
Only way it is as, when n itself is multiple of 15. Chk it by plugin values.
So sufficient.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1