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

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

Geometry - Squares

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 966
Joined: Sat Jan 02, 2010 8:06 amFollowed by: 21 members
Thanked: 230 times
by shankar.ashwin » Mon Nov 07, 2011 11:13 am
The diagonal length of a square is 14.1 sq. units. What is the area of the square, rounded to the nearest integer?
(Sqrt(2) is approximately 1.41)


A) 96
B) 97
C) 98
D) 99
E) 100

OA - D
Last edited by shankar.ashwin on Mon Nov 07, 2011 12:05 pm, edited 1 time in total.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 588
Joined: Sun Oct 16, 2011 9:42 amFollowed by: 9 members
Location: New Delhi, India
Thanked: 130 times
GMAT Score:720

by rijul007 » Mon Nov 07, 2011 11:19 am
diagonal = 10*root(2)
each side = 10*root(2)/root(2) = 10
Area = 100

Option E
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 416
Joined: Tue Aug 30, 2011 2:18 pmFollowed by: 9 members
Location: Delhi, India
Thanked: 13 times

by vaibhavgupta » Mon Nov 07, 2011 11:29 am
shankar.ashwin wrote:The diagonal length of a square is 14.1 sq. units. What is the area of the square, rounded to the nearest integer?
(Sqrt(2) is approximately 1.41)


A) 96
B) 97
C) 98
D) 99
E) 100
Through Diagonal we find the side of the side and then the area ! :)

IMO E
If OA is A, IMO B
If OA is B, IMO C
If OA is C, IMO D
If OA is D, IMO E
If OA is E, IMO A

FML!! :/
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Community Manager
Posts: 1060
Joined: Fri May 13, 2011 6:46 amFollowed by: 52 members
Location: Utrecht, The Netherlands
Thanked: 318 times

by neelgandham » Mon Nov 07, 2011 11:45 am
shankar.ashwin wrote:The diagonal length of a square is 14.1 sq. units. What is the area of the square, rounded to the nearest integer?
(Sqrt(2) is approximately 1.41)


A) 96
B) 97
C) 98
D) 99
E) 100
Length of the diagonal of a square is equal to (Square root(2))*Length of the side
Area of the square is equal to side*side = [(Length of the diagonal)/(Square root(2))]*[(Length of the diagonal)/(Square root(2))]
Implies, Area of the square is equal to [(Length of the diagonal)^2]/2 = 14.1 * 14.1 /2 = 99.405

IMO D

When the options are as close as provided above, I think we got to be really careful !
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
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 8
Joined: Mon Sep 26, 2011 9:12 amFollowed by: 3 members
Thanked: 3 times
GMAT Score:710

by ripulgupta » Mon Nov 07, 2011 12:40 pm
Isn't question requiring so much calculation outside the scope of GMAT?

Thanks and regards,
Ripul
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 70
Joined: Tue May 17, 2011 8:51 pm
Thanked: 9 times

by ariz » Tue Nov 08, 2011 12:25 pm
neelgandham wrote: Length of the diagonal of a square is equal to (Square root(2))*Length of the side
Area of the square is equal to side*side = [(Length of the diagonal)/(Square root(2))]*[(Length of the diagonal)/(Square root(2))]
Implies, Area of the square is equal to [(Length of the diagonal)^2]/2 = 14.1 * 14.1 /2 = 99.405
I did not know this, this is very useful. Thank you!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Community Manager
Posts: 1060
Joined: Fri May 13, 2011 6:46 amFollowed by: 52 members
Location: Utrecht, The Netherlands
Thanked: 318 times

by neelgandham » Tue Nov 08, 2011 3:31 pm
My Pleasure Ariz !

Shankar: Can you please post the OA and the source please ?
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
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 966
Joined: Sat Jan 02, 2010 8:06 amFollowed by: 21 members
Thanked: 230 times

by shankar.ashwin » Tue Nov 08, 2011 9:58 pm
The OA is D as mentioned. Question is from Nova's Math Bible.

Find attached the original explanation if interested.
Attachments
Screen Shot 2011-11-09 at 11.27.14 AM.png
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Newbie | Next Rank: 10 Posts
Posts: 1
Joined: Wed Jan 19, 2011 2:14 am

by kanumurisri » Wed Nov 16, 2011 6:48 am
neelgandham wrote:
shankar.ashwin wrote:The diagonal length of a square is 14.1 sq. units. What is the area of the square, rounded to the nearest integer?
(Sqrt(2) is approximately 1.41)


A) 96
B) 97
C) 98
D) 99
E) 100
Length of the diagonal of a square is equal to (Square root(2))*Length of the side
Area of the square is equal to side*side = [(Length of the diagonal)/(Square root(2))]*[(Length of the diagonal)/(Square root(2))]
Implies, Area of the square is equal to [(Length of the diagonal)^2]/2 = 14.1 * 14.1 /2 = 99.405

IMO D

When the options are as close as provided above, I think we got to be really careful !

If it was not mentioned in the question, about the assumption, then what ever you said is correct.
But with the assumption mentioned, I doubt what the answer is....

-Srini
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Community Manager
Posts: 1060
Joined: Fri May 13, 2011 6:46 amFollowed by: 52 members
Location: Utrecht, The Netherlands
Thanked: 318 times

by neelgandham » Wed Nov 16, 2011 7:34 am
kanumurisri wrote: If it was not mentioned in the question, about the assumption, then what ever you said is correct.
But with the assumption mentioned, I doubt what the answer is....
-Srini
The Official answer is D as mentioned. The question is from Nova's Math Bible.
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
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 401
Joined: Tue May 24, 2011 1:14 amFollowed by: 5 members
Thanked: 37 times

by MBA.Aspirant » Wed Nov 16, 2011 4:11 pm
area = 1/2 Diagonal ^2

(14.1 * 14.1)/2 = 99 to the nearest integer
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1