GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Jun 2018, 06:55

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is the hundredths digit in the decimal expression of r/55?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 46251
What is the hundredths digit in the decimal expression of r/55? [#permalink]

Show Tags

New post 14 Jan 2018, 06:28
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

55% (01:03) correct 45% (01:17) wrong based on 43 sessions

HideShow timer Statistics

Expert Post
examPAL Representative
User avatar
S
Joined: 07 Dec 2017
Posts: 433
Re: What is the hundredths digit in the decimal expression of r/55? [#permalink]

Show Tags

New post 14 Jan 2018, 14:01
Bunuel wrote:
What is the hundredths digit in the decimal expression of r/55?

(1) r is the least common denominator of 1/7 and positive integer x.
(2) r is prime.


To know the digits in a decimal expansion, we need to know the remainder of r/55.
We'll look for the statement that gives us this information, a Logical approach.

(1) The LCD of 1/7 and x/1 is the same as the least common multiple of 7 and 1 which is 7.
So r = 7 which is sufficient.

(2) This does not give us the information we need (the remainder)
Insufficient!

(A) is our answer.
_________________

David
Senior tutor at examPAL
Signup for a free GMAT course
Image
Image
We won some awards:
Image
Join our next webinar (free)
Save up to $250 on examPAL packages (special for GMAT Club members)

Re: What is the hundredths digit in the decimal expression of r/55?   [#permalink] 14 Jan 2018, 14:01
Display posts from previous: Sort by

What is the hundredths digit in the decimal expression of r/55?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.