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

It is currently 22 Nov 2019, 05:38

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

In order to complete a reading assignment on time, Terry

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

Hide Tags

Find Similar Topics 
Senior Manager
Senior Manager
User avatar
S
Joined: 24 Jun 2016
Posts: 344
GMAT 1: 770 Q60 V60
GPA: 4
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 09 Aug 2017, 18:55
1
There is really one variable in this question: other unknowns can be derived from the number of days in total Terry has to complete the reading assignment. So let x be that number of days. We have:

90x = Total number of pages = 75(x-6) + 690
So 15x = 240
x = 16

QED.
_________________
Stuck in the 600's and want to score 700+ on the GMAT?
If this describes you, we should talk. I specialize in getting motivated students into the 700's.


$90/hour as of August 2019. I am not accepting any more students for the Fall 2019 application cycle, but if you are planning to apply in 2020, feel free to reach out!


http://www.facebook.com/HanoiGMATtutor
HanoiGMATTutor@gmail.com
Manager
Manager
avatar
B
Joined: 07 Jun 2017
Posts: 100
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 09 Aug 2017, 19:06
Please correct me if I am wrong,

My thinking is
She has 690 pages left for the last 6 days
She supposed to 540 pages left (since she planned to read 90 pages per day)

690-540= 160 pages behind)

She had been reading 75 pages per day, (90-75= 15 behind every day)
160/15= 10~ days at the beginning
10~days+ the last 6 days = 16
Senior Manager
Senior Manager
User avatar
S
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 416
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 20 Jul 2018, 08:42
Top Contributor
Total Page = 75n + 690
Average is 90
so , [[75n+90]/n+6 ]] = 90
= 75n + 690 = 90n + 540
= 15n = 150
n = 10 days [she read 75 pages per day]
She will require = 10+6 = 16 days.
_________________
Director
Director
avatar
P
Joined: 31 Jul 2017
Posts: 510
Location: Malaysia
Schools: INSEAD Jan '19
GMAT 1: 700 Q50 V33
GPA: 3.95
WE: Consulting (Energy and Utilities)
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 20 Jul 2018, 09:20
nelz007 wrote:
In order to complete a reading assignment on time, Terry planned to read 90 pages per day. However, she read only 75 pages per day at first, leaving 690 pages to be read during the last 6 days before the assignment was to be completed. How many days in all did Terry have to complete the assignment on time?

(A) 15
(B) 16
(C) 25
(D) 40
(E) 46

Stuck on this question its from OG 13 - 119


Let n be the total number of Days.

90n = 75(n-6) + 690
n = 16.
_________________
If my Post helps you in Gaining Knowledge, Help me with KUDOS.. !!
Veritas Prep GMAT Instructor
User avatar
V
Joined: 16 Oct 2010
Posts: 9803
Location: Pune, India
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 01 Dec 2018, 02:48
nelz007 wrote:
In order to complete a reading assignment on time, Terry planned to read 90 pages per day. However, she read only 75 pages per day at first, leaving 690 pages to be read during the last 6 days before the assignment was to be completed. How many days in all did Terry have to complete the assignment on time?

(A) 15
(B) 16
(C) 25
(D) 40
(E) 46

Stuck on this question its from OG 13 - 119



"In order to complete a reading assignment on time, Terry planned to read 90 pages per day. "
Reading 90 pages/day would have completed the assignment.

"However, she read only 75 pages per day at first,"
She read 15 fewer pages each day till ...

leaving 690 pages to be read during the last 6 days before the assignment was to be completed.
690 pages were left for 6 days. Actually as per plan only 90*6 = 540 pages should have been left for 6 days.
Why were there 690 - 540 = 150 extra pages left to read? Because she read 15 fewer pages each day. To gather 150 extra pages left unread, she must have read 15 fewer pages for 10 days.

"How many days in all did Terry have to complete the assignment on time?"
She has already read for 10 days and has 6 more to go so she had total 16 days.

Answer (B)
_________________
Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >
Manager
Manager
User avatar
S
Joined: 17 Mar 2018
Posts: 71
Reviews Badge
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 01 Dec 2018, 03:21
Let number of days with 90 pages per day be x
Hence total pages in book is 90x

However, for the beginning days (lets say y) only 75 pages were read,
hence 75y+690=90x

we know y+6=x days, so

75 y+ 690 = 90 (y+6)
75 y+ 690= 90y+ 540

15 y= 150
y= 10

total days= 10+6= 16
GMAT Club Legend
GMAT Club Legend
User avatar
V
Joined: 12 Sep 2015
Posts: 4076
Location: Canada
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 26 Feb 2019, 10:38
Top Contributor
nelz007 wrote:
In order to complete a reading assignment on time, Terry planned to read 90 pages per day. However, she read only 75 pages per day at first, leaving 690 pages to be read during the last 6 days before the assignment was to be completed. How many days in all did Terry have to complete the assignment on time?

(A) 15
(B) 16
(C) 25
(D) 40
(E) 46


Let's start with a word equation

We can write: (total number of pages to be read at INTENDED rate of 90 pages/day) = (total number of pages ACTUALLY read at 75 pages/day) + 690 more pages

Let x = number of days to complete reading assignment at 90 pages per day
So, x - 6 = number of days reading at 75 pages per day (since Terry spent the last 6 days reading 690 pages)

At a rate of 90 pages/day, 90x = number of pages that COULD be read in x days
At a rate of 75 pages/day, 75(x - 6) = number of pages ACTUALLY read in x-6 days

We get: 90x = 75(x - 6) + 690
Expand to get: 90x = 75x - 450 + 690
Simplify to get: 90x = 75x + 240
We get: 15x = 240
Solve: x = 240/15 = 16

Answer: B

Cheers,
Brent
_________________
Test confidently with gmatprepnow.com
Image
Manager
Manager
avatar
G
Joined: 17 Aug 2018
Posts: 232
GMAT 1: 610 Q43 V31
GMAT 2: 640 Q45 V32
GMAT 3: 640 Q47 V31
Premium Member
In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post Updated on: 28 Jul 2019, 07:47
Let's apply logics. She had some "slow" days (x) and "quick" days (6).

Plan: 90 p/day
Actual: 75 p/day

So, every day she was getting 90 - 75 = 15 pages behind.

If she was on schedule, she would have had 90 p/day * 6 days = 540 pages, but she is left with 690 pages. So, she fell behind by 150 pages, which are now extra work. We already know that during the "slow" days she fell behind by 15 pages every day, and the total of "extra work" is 150 pages, so she had 150 / 15 = 10 "slow" days.

In total, we have 10 slow days and 6 quick days -> 10+6 = 16.

Those who like procrastination most likely solved this problem without any issues :-D

Originally posted by mykrasovski on 12 Jul 2019, 07:05.
Last edited by mykrasovski on 28 Jul 2019, 07:47, edited 1 time in total.
Intern
Intern
avatar
B
Joined: 05 May 2019
Posts: 5
CAT Tests
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 28 Jul 2019, 02:29
Let x be the number of days we are solving for.

Terry was supposed to read 90x pages over x days.

We are told that she read 75 pages per day at first and 690 for the last 6 days. Easy equation can be set up:

75 (x-6) + 690 = 90x

Solving for x:
75x - 450 + 690 = 90x
15x = 240
x = 16

Answer is (B)

I think that this is the fastest method, it is faster than considering x as the number of days she spent reading 75 pages a day, as this method directly gets us to the 16 days rather then solving for x = 10 and then adding the 6 to get 16.

What do you think?
Intern
Intern
avatar
B
Joined: 06 May 2019
Posts: 31
Location: India
Concentration: General Management, Marketing
CAT Tests
Re: In order to complete a reading assignment on time, Terry  [#permalink]

Show Tags

New post 03 Aug 2019, 07:00
SOLVE THIS:

75(X-6) +690=90X
GMAT Club Bot
Re: In order to complete a reading assignment on time, Terry   [#permalink] 03 Aug 2019, 07:00

Go to page   Previous    1   2   [ 30 posts ] 

Display posts from previous: Sort by

In order to complete a reading assignment on time, Terry

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





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