• EMPOWERgmat Slider
    1 Hour Free
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider
  • Varsity Tutors
    Award-winning private GMAT tutoring
    Register now and save up to $200

    Available with Beat the GMAT members only code

    MORE DETAILS
    Varsity Tutors
  • Veritas Prep
    Free Veritas GMAT Class
    Experience Lesson 1 Live Free

    Available with Beat the GMAT members only code

    MORE DETAILS
    Veritas Prep
  • e-gmat Exclusive Offer
    Get 300+ Practice Questions
    25 Video lessons and 6 Webinars for FREE

    Available with Beat the GMAT members only code

    MORE DETAILS
    e-gmat Exclusive Offer
  • PrepScholar GMAT
    5 Day FREE Trial
    Study Smarter, Not Harder

    Available with Beat the GMAT members only code

    MORE DETAILS
    PrepScholar GMAT
  • Target Test Prep
    5-Day Free Trial
    5-day free, full-access trial TTP Quant

    Available with Beat the GMAT members only code

    MORE DETAILS
    Target Test Prep
  • Kaplan Test Prep
    Free Practice Test & Review
    How would you score if you took the GMAT

    Available with Beat the GMAT members only code

    MORE DETAILS
    Kaplan Test Prep
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

    MORE DETAILS
    Magoosh
  • Economist Test Prep
    Free Trial & Practice Exam
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test Prep

PS(Geometry)

This topic has 2 expert replies and 2 member replies
rintoo22 Senior | Next Rank: 100 Posts Default Avatar
Joined
06 May 2012
Posted:
73 messages
Upvotes:
6
Target GMAT Score:
650+

PS(Geometry)

Post Sat Apr 06, 2013 12:20 pm
The sides of a square region, measured to the
nearest centimeter, are 6 centimeters long. The
least possible value of the actual area of the
square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm

How to approach such questions ?

  • +1 Upvote Post
  • Quote
  • Flag
Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!

GMAT/MBA Expert

Post Sun Apr 07, 2013 5:16 am
As an aside, notice that the question requires us to find (5.5)^2
This is the same as squaring 55 to get 3025 and then moving the decimal over 2 spaces to get 30.25

If anyone is interested, there's a 3-second technique for squaring numbers ending in 5. To learn this technique, watch our free video: http://www.gmatprepnow.com/module/gmat-powers-and-roots?id=1024

Cheers,
Brent

_________________
Brent Hanneson – Founder of GMATPrepNow.com
Use our video course along with Beat The GMAT's free 60-Day Study Guide

Check out the online reviews of our course
Come see all of our free resources

  • +1 Upvote Post
  • Quote
  • Flag
Thanked by: royrijit1
GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMAT’s FREE 60-Day Study Guide and reach your target score in 2 months!
bharat.bondalapati Junior | Next Rank: 30 Posts Default Avatar
Joined
05 Apr 2013
Posted:
14 messages
Upvotes:
3
Post Sun Apr 07, 2013 5:02 am
30.25

Key info is "measured to the nearest cm". Since, we need the least area possible for the square the least side length possible is 5.5. Hence, least area possible is 30.25cm^2

_________________
Best,
Bharat

If you find my post helpful, please click on the 'Thank' icon.

  • +1 Upvote Post
  • Quote
  • Flag
srcc25anu Master | Next Rank: 500 Posts Default Avatar
Joined
11 Jun 2010
Posted:
423 messages
Followed by:
2 members
Upvotes:
86
Target GMAT Score:
720+
Post Sat Apr 06, 2013 1:14 pm
SIde of square measured to nearest integer = 6
therefore the size could range from 5.5 - 6.4
for area of this square to be the smalles we should consider the smallest number which is 5.5
and if side = 5.5, area of square = 5.5 * 5.5 = 30.25
Hence D

  • +1 Upvote Post
  • Quote
  • Flag

GMAT/MBA Expert

Post Sat Apr 06, 2013 1:02 pm
rintoo22 wrote:
The sides of a square region, measured to the
nearest centimeter, are 6 centimeters long. The
least possible value of the actual area of the
square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm

How to approach such questions ?
The key information here is measured to the nearest centimeter.
So, the sides do not necessarily have length 6.
In fact 5.5 < (length of 1 side) < 6.5

We want the smallest possible area. This will occur when the side lengths are minimized.
The shortest length of each side is 5.5 cm.
So, the smallest possible area = (5.5)(5.5) = 30.25 = D

Cheers,
Brent

_________________
Brent Hanneson – Founder of GMATPrepNow.com
Use our video course along with Beat The GMAT's free 60-Day Study Guide

Check out the online reviews of our course
Come see all of our free resources

  • +1 Upvote Post
  • Quote
  • Flag
Thanked by: rintoo22
GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMAT’s FREE 60-Day Study Guide and reach your target score in 2 months!

Best Conversation Starters

1 Roland2rule 174 topics
2 lheiannie07 110 topics
3 ardz24 64 topics
4 LUANDATO 56 topics
5 swerve 46 topics
See More Top Beat The GMAT Members...

Most Active Experts

1 image description Brent@GMATPrepNow

GMAT Prep Now Teacher

150 posts
2 image description Jeff@TargetTestPrep

Target Test Prep

145 posts
3 image description Rich.C@EMPOWERgma...

EMPOWERgmat

116 posts
4 image description GMATGuruNY

The Princeton Review Teacher

103 posts
5 image description Scott@TargetTestPrep

Target Test Prep

98 posts
See More Top Beat The GMAT Experts