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

It is currently 19 Oct 2018, 04:49

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

Derek can read x pages in 5 minutes. At this rate, how long will it

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 50001
Derek can read x pages in 5 minutes. At this rate, how long will it  [#permalink]

Show Tags

New post 02 Dec 2015, 06:51
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

69% (00:38) correct 31% (00:42) wrong based on 109 sessions

HideShow timer Statistics

Intern
Intern
User avatar
Joined: 11 Mar 2015
Posts: 18
GPA: 3.4
Re: Derek can read x pages in 5 minutes. At this rate, how long will it  [#permalink]

Show Tags

New post 02 Dec 2015, 06:55
As given
x pages in 5 min, so pages per min = x/5
for P pages time = No .of pages /Pages per min
=p/x/5
=5p/x


Hence A
CEO
CEO
User avatar
P
Joined: 08 Jul 2010
Posts: 2542
Location: India
GMAT: INSIGHT
WE: Education (Education)
Reviews Badge
Re: Derek can read x pages in 5 minutes. At this rate, how long will it  [#permalink]

Show Tags

New post 02 Dec 2015, 07:13
Bunuel wrote:
Derek can read x pages in 5 minutes. At this rate, how long will it take him to read p pages?

A. 5p/x
B. 5x/p
C. p/(5x)
D. 5/(px)
E. px/5


x page in 5 mins

i.e. 1 page in 5/x mins

i.e. p pages in (5/x)*p

Answer: option A
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Target Test Prep Representative
User avatar
P
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 3886
Location: United States (CA)
Re: Derek can read x pages in 5 minutes. At this rate, how long will it  [#permalink]

Show Tags

New post 02 Feb 2018, 12:25
Bunuel wrote:
Derek can read x pages in 5 minutes. At this rate, how long will it take him to read p pages?

A. 5p/x
B. 5x/p
C. p/(5x)
D. 5/(px)
E. px/5


The rate for Derek is x/5, is it takes Derek p/(x/5) = 5p/x minutes.

Answer: A
_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Senior SC Moderator
avatar
V
Joined: 22 May 2016
Posts: 2034
Premium Member CAT Tests
Derek can read x pages in 5 minutes. At this rate, how long will it  [#permalink]

Show Tags

New post 02 Feb 2018, 15:43
Bunuel wrote:
Derek can read x pages in 5 minutes. At this rate, how long will it take him to read p pages?

A. 5p/x
B. 5x/p
C. p/(5x)
D. 5/(px)
E. px/5

Another approach: assign values. Pick values that prevent your having to work with fractions less than 1 (e.g. don't pick x = 1 and p = 2)

Let x = 10 pages
Let p = 20 pages

Derek reads \(\frac{10pgs}{5mins}\). How long to read 20 pages?

Mental math:
Twice as many pages, twice as much time = 10 minutes, OR

\(\frac{10pgs}{5mins}=\frac{20pgs}{X mins}\)
\(10 * X = 5 * 20\)
\(10X = 100\)
\(X = 10\)
minutes

Use x = 10, p = 20. Find the answer that yields 10.

Eliminate D and E immediately. Look at numerators and denominators. D is too small and E is too large.

A. 5p/x
\(\frac{(5*20)}{10}= \frac{100}{10} = 10\) MATCH

B. 5x/p
\(\frac{(5*10)}{20}= \frac{50}{20}=\frac{5}{2}\) NOT A MATCH

C. p/(5x)
\(\frac{20}{5*10}= \frac{20}{50}\) NOT A MATCH

D. 5/(px) - dismiss. It's tiny.

E. px/5 - dismiss. It's huge.

ANSWER A

*With this method, you must check all answers that you cannot eliminate immediately, such as D and E here. If more than one answer yields 10 (rare), pick a new set of numbers.
_________________

The only thing more dangerous than ignorance is arrogance.
-- Albert Einstein

GMAT Club Bot
Derek can read x pages in 5 minutes. At this rate, how long will it &nbs [#permalink] 02 Feb 2018, 15:43
Display posts from previous: Sort by

Derek can read x pages in 5 minutes. At this rate, how long will it

  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®.