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

It is currently 22 Jan 2019, 02:37

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 in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • The winners of the GMAT game show

     January 22, 2019

     January 22, 2019

     10:00 PM PST

     11:00 PM PST

    In case you didn’t notice, we recently held the 1st ever GMAT game show and it was awesome! See who won a full GMAT course, and register to the next one.
  • Key Strategies to Master GMAT SC

     January 26, 2019

     January 26, 2019

     07:00 AM PST

     09:00 AM PST

    Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.

A terminating decimal is a number with a finite number of nonzero digi

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

Hide Tags

 
SVP
SVP
User avatar
V
Status: Preparing GMAT
Joined: 02 Nov 2016
Posts: 2037
Location: Pakistan
GPA: 3.39
Premium Member CAT Tests
A terminating decimal is a number with a finite number of nonzero digi  [#permalink]

Show Tags

New post 16 Mar 2017, 09:23
2
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

60% (03:09) correct 40% (02:21) wrong based on 23 sessions

HideShow timer Statistics

A terminating decimal is a number with a finite number of nonzero digits. For example, 35, 14.07, and 5.341 are three terminating decimals. For positive integers p and q, when p/q is expressed as a decimal, is p/q a terminating decimal?

(1) p is the sum of three consecutive odd multiples of 5.
(2) 2q^2 + 144 = 36q

_________________

Final days of the GMAT Exam? => All GMAT Flashcards.
This Post Helps = Press +1 Kudos
Best of Luck on the GMAT!!

Senior Manager
Senior Manager
avatar
B
Joined: 13 Oct 2016
Posts: 367
GPA: 3.98
Re: A terminating decimal is a number with a finite number of nonzero digi  [#permalink]

Show Tags

New post 16 Mar 2017, 11:39
1
1
SajjadAhmad wrote:
A terminating decimal is a number with a finite number of nonzero digits. For example, 35, 14.07, and 5.341 are three terminating decimals. For positive integers p and q, when p/q is expressed as a decimal, is p/q a terminating decimal?

(1) p is the sum of three consecutive odd multiples of 5.
(2) 2q^2 + 144 = 36q


Hi

(1) x=odd integer

\(p=5*(x-2) + 5*x + 5*(x+2) = 5*3*x\), that is, p has at least one factor of 3. (ex. 5*7 + 5*9 + 5*11 = 5*27)

But we don't have any information about q.

(2) \(2q^2 - 36q + 144 = 0\)

\(q^2 - 18q + 72 = 0\)

\((q - 6)*(q - 12) = 0\)

\(q = 2*3\) or \(q = 2^2*3.\)

In order to be a terminating decimal denominator should be in the form \(2^a*5^b\).

We don't know whether 3 will divide \(p\) evenly or not. Insufficient.

(1)&(2) Now we definitely know that our nominator has at least one factor of 3 which after cancellation leaves denominators: \(2^1\) or \(2^2\). Sufficient.

Answer C.
GMAT Club Bot
Re: A terminating decimal is a number with a finite number of nonzero digi &nbs [#permalink] 16 Mar 2017, 11:39
Display posts from previous: Sort by

A terminating decimal is a number with a finite number of nonzero digi

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


Copyright

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®.