BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

word problem

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 344
Joined: Sat Nov 12, 2011 3:21 am
Thanked: 1 times
Followed by:2 members

word problem

by sud21 » Sat Jan 28, 2012 11:32 pm
From Sunday to nest Saturday, Mary read (and finished?) a book with 392 pages. After the first day, she read 12 more pages than the previous day. How many pages did she read on Sunday?
Top
Source: — Problem Solving |
User avatar
Community Manager
Posts: 1060
Joined: Fri May 13, 2011 6:46 am
Location: Utrecht, The Netherlands
Thanked: 318 times
Followed by:52 members

by neelgandham » Sun Jan 29, 2012 12:38 pm
From Sunday to nest Saturday, Mary read (and finished?) a book with 392 pages. After the first day, she read 12 more pages than the previous day. How many pages did she read on Sunday?

I am not really sure if the question is properly framed, nonetheless I will try to answer it to the best of my knowledge.

Let the number of pages read by Mary on Sunday be X, then
The number of pages read by Mary on Monday = X + 12
The number of pages read by Mary on Tuesday = X + 2*12
The number of pages read by Mary on Wednesday = X + 3*12
The number of pages read by Mary on Thursday = X + 4*12
The number of pages read by Mary on Friday = X + 5*12
The number of pages read by Mary on Saturday = X + 6*12

Total number of pages read by Mary through the week = X + X + 12 + X + 2*12 + X + 3*12 + X + 4*12 + X + 5*12 + X + 6*12 = 392
That is 7X + 12(1+2+3+4+5+6) = 392
7X = 140
X = 20 = Number of pages read by Mary on Sunday!
Anil Gandham
Welcome to BEATtheGMAT | Photography | Getting Started | BTG Community rules | MBA Watch
Check out GMAT Prep Now's online course at https://www.gmatprepnow.com/
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 273
Joined: Tue Sep 21, 2010 5:37 am
Location: Durham, NC
Thanked: 154 times
Followed by:74 members
GMAT Score:770

by Whitney Garner » Tue Jan 31, 2012 10:37 am
sud21 wrote:From Sunday to nest Saturday, Mary read (and finished?) a book with 392 pages. After the first day, she read 12 more pages than the previous day. How many pages did she read on Sunday?
Hi Sud21!

You can use properties of consecutive sets for a bit of a shortcut. Because Mary is reading a number of pages that increases each day by 12 books, the average of the total read will be the number of pages she read on the middle day (Wednesday). This means she read 392/7 = 56 pages on Wednesday. Count back 3 days at 12 books each (36 books), she read [spoiler]56-36 = 20[/spoiler] books on Sunday.

:)
Whit
Whitney Garner
GMAT/GRE/EA Instructor & Anxiety/Accommodations Coach
www.whitneygarner.com

Contributor to Beat The GMAT!

Math is a lot like love - a simple idea that can easily get complicated :heart-eyes:
Top
Post new topic Post Reply
• Page 1 of 1