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

It is currently 17 Jun 2018, 21:14

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

Which of the following numbers has the greatest number of unique digit

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

Hide Tags

SVP
SVP
User avatar
V
Status: Preparing for the GMAT
Joined: 02 Nov 2016
Posts: 1533
Location: Pakistan
GPA: 3.39
Premium Member
Which of the following numbers has the greatest number of unique digit [#permalink]

Show Tags

New post 24 Sep 2017, 12:14
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

80% (00:33) correct 20% (00:43) wrong based on 41 sessions

HideShow timer Statistics

Which of the following numbers has the greatest number of unique digits?

A 1/6
B 1/4
C 1/3
D 3/4
E 5/7

_________________

Official PS Practice Questions
Press +1 Kudos if this post is helpful

Manager
Manager
avatar
B
Joined: 06 Aug 2017
Posts: 84
GMAT 1: 570 Q50 V18
GMAT 2: 610 Q49 V24
Re: Which of the following numbers has the greatest number of unique digit [#permalink]

Show Tags

New post 24 Sep 2017, 13:42
SajjadAhmad wrote:
Which of the following numbers has the greatest number of unique digits?

A 1/6
B 1/4
C 1/3
D 3/4
E 5/7


This can be determined by actual division, which is easiest approach here.

A 0.16....
B 0.52
C 0.3....
D 0.75
E 0.7142....

Hence E is the answer.
_________________

-------------------------------------------------------------------------------
Kudos are the only way to tell whether my post is useful.

GMAT PREP 1: Q50 V34 - 700

Veritas Test 1: Q43 V34 - 630
Veritas Test 2: Q46 V30 - 620
Veritas Test 3: Q45 V29 - 610
Veritas Test 4: Q49 V30 - 650

GMAT PREP 2: Q50 V34 - 700

Veritas Test 5: Q47 V33 - 650
Veritas Test 5: Q46 V33 - 650

Expert Post
Top Contributor
CEO
CEO
User avatar
P
Joined: 12 Sep 2015
Posts: 2557
Location: Canada
Re: Which of the following numbers has the greatest number of unique digit [#permalink]

Show Tags

New post 24 Sep 2017, 16:14
Top Contributor
1
I think the question needs some additional wording to indicate that we're talking about the DECIMAL EQUIVALENT of each fraction.
As it stands, each FRACTION has exactly 2 unique digits.
For example, 1/4 has a 1 and a 4
1/3 has a 1 and a 3
etc

Here's one way to word the original question....

SajjadAhmad wrote:
Which of the following fractions has the greatest number of unique digits in its decimal equivalent?

A 1/6
B 1/4
C 1/3
D 3/4
E 5/7


Interestingly enough, we don't even need to convert answer choice E to a decimal.
Here's why:

A 1/6 = 0.1666666... (2 unique digits)
B 1/4 = 0.25 (2 unique digits)
C 1/3 = 0.3333333... (1 unique digit)
D 3/4 = 0.75 (2 unique digits)

At this point, we know that the decimal equivalent of E (5/7) cannot have just 1 unique digit, since answer choices A, B and D would then be TIED for having the greatest number of unique digits
Likewise, the decimal equivalent of E (5/7) cannot have 2 unique digits, because that would mean answer choices A, B, D and E would then be TIED for having the greatest number of unique digits.
So, we can safely conclude that answer choice E must have the greatest number of unique digits

Cheers,
Brent
_________________

Brent Hanneson – Founder of gmatprepnow.com

Image

Re: Which of the following numbers has the greatest number of unique digit   [#permalink] 24 Sep 2017, 16:14
Display posts from previous: Sort by

Which of the following numbers has the greatest number of unique digit

  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®.