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

 It is currently 05 May 2015, 07:06

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# DS remainder and divisibility

Author Message
TAGS:
Manager
Joined: 11 Jul 2004
Posts: 120
Followers: 1

Kudos [?]: 2 [0], given: 0

DS remainder and divisibility [#permalink]  26 Aug 2004, 14:08
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
hi i dont relaly have a official question but i am having trouble with DS with remainders

eg:

is n divisible by 7 or what is the remainder when n is divided by 7

1. when x is dividived by 6 the remainder is 1
2. when x is divided by 10 the remainder is 2

THIS IS JUST A MOCK question (you may not be able to solve it)

just owndeirng what the best approach to solving these type of questions is and if anyone has any examples

thanks
Senior Manager
Joined: 25 Jul 2004
Posts: 274
Followers: 1

Kudos [?]: 7 [0], given: 0

If i were to attack this problem, i would begin by getting a feel for the numbers...

ssuming n is positive

1. when x is dividived by 6 the remainder is 1
x could be 1, 7, 13, 19, 25, 31, 37 etc... clearly this adds nothing
mathematically, this tells us that x=6K + 1 for some k

2. when x is divided by 10 the remainder is 2
x coule be 2,12,22,32,42,52,62 etc.. clearly this doesn't solve the problem

the union of these sequences tells us however that x will never be divisble by 7, because the union of the sequences is the empty set.

tog
Similar topics Replies Last post
Similar
Topics:
Divisibility and remainders 0 20 Oct 2014, 10:49
Remainders and Divisibility 0 28 Jul 2014, 20:54
GMATPrep - DS - Remainder and divisibility 4 16 Dec 2006, 12:19
DS - Divisibility 4 09 Sep 2006, 11:45
divisible ds 8 14 Apr 2006, 01:48
Display posts from previous: Sort by