Find all School-related info fast with the new School-Specific MBA Forum

It is currently 30 Sep 2014, 10:00

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If 6 is not a factor of d, is 12d divisible by 6?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 12 Nov 2011
Posts: 143
Followers: 0

Kudos [?]: 6 [0], given: 24

If 6 is not a factor of d, is 12d divisible by 6? [#permalink] New post 02 Aug 2012, 12:05
If 6 is not a factor of d, is 12d divisible by 6?

The answer is YES. But if d=0.1, than 12d=1.2 and it is not divisible by 6. Any thoughts?
Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 23063
Followers: 3537

Kudos [?]: 27223 [1] , given: 2725

Re: If 6 is not a factor of d, is 12d divisible by 6? [#permalink] New post 02 Aug 2012, 12:27
1
This post received
KUDOS
Expert's post
Runner2 wrote:
If 6 is not a factor of d, is 12d divisible by 6?

The answer is YES. But if d=0.1, than 12d=1.2 and it is not divisible by 6. Any thoughts?


You are right if we were not told that d is an integer then 12d may or may not be divisible by 6, consider d=1 and d=1/3. Though MGMAT states on that page that "all variables in problems #1 through #11 are assumed to be integers unless otherwise indicated." Hence their answer YES is correct.

Also notice that every GMAT divisibility question will tell you in advance that any unknowns represent positive integers (ALL GMAT divisibility questions are limited to positive integers only).

Hope it's clear.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Re: If 6 is not a factor of d, is 12d divisible by 6?   [#permalink] 02 Aug 2012, 12:27
    Similar topics Author Replies Last post
Similar
Topics:
1 Is z divisible by 6? (1) The greatest common factor between topher 6 24 Jun 2009, 11:39
1 5^12+5^13 = (A) 5^25 (B) 10^25 (C) 6(5^12) (D) 10^12+5 (E) yogachgolf 1 07 Dec 2007, 11:01
Experts publish their posts in the topic How many of the factors of 72 are divisible by 2? 4 5 6 bmwhype2 5 21 Nov 2007, 07:07
(D/S) N is divisible by 6 pretttyune 15 13 Nov 2007, 07:12
5^12+5^13= A. 5^25 B. 10^25 C. 6(5^12) D. 10^12+5 E. 2 jamesrwrightiii 8 27 Jul 2007, 20:45
Display posts from previous: Sort by

If 6 is not a factor of d, is 12d divisible by 6?

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.