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

Redeem

books --- DS problem

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 234
Joined: Fri Oct 01, 2010 7:28 pm
Location: chennai
Thanked: 5 times
Followed by:4 members

books --- DS problem

by pappueshwar » Fri Feb 17, 2012 9:05 am
pls assist in understanding the problem

Susan has a 5-foot long bookshelf that she wants to fill with 22 books of differing sizes. Each book can fit on the shelf, but they cannot all fit on the shelf. In order to fit all of her books on the same shelf, she would need a 5.5-foot long bookshelf. What is the maximum number of books she can fit on her shelf?

(1) The 8 thinnest books each have a thickness of 2 inches.

(2) The 2 thickest books each have a thickness of 5 inches.
Top
Source: — Data Sufficiency |
User avatar
MBA Admissions Consultant
Posts: 2279
Joined: Fri Nov 11, 2011 7:51 am
Location: New York
Thanked: 660 times
Followed by:266 members
GMAT Score:770

by Jim@StratusPrep » Fri Feb 17, 2012 10:13 am
First start with the thickness of all of her books

5.5 ft x 12 in = 66in.

66/22 = 3 inches

She can fit 60 inches of books.

A) You really don't know the thickness of the other books. If they are all just over 3 inches you would be able to fit a different amount than if you had 2 that were 6 for example

B) Just these last 2 books will not fit, because you have 59 inches of books remaining to fit in 60 inches of space.
GMAT Answers provides a world class adaptive learning platform.
-- Push button course navigation to simplify planning
-- Daily assignments to fit your exam timeline
-- Organized review that is tailored based on your abiility
-- 1,000s of unique GMAT questions
-- 100s of handwritten 'digital flip books' for OG questions
-- 100% Free Trial and less than $20 per month after.
-- Free GMAT Quantitative Review

Image
Top
Post new topic Post Reply
• Page 1 of 1