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

It is currently 23 Jun 2018, 16:28

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If the area of a square of side x is 5, what is the area of a square

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

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 46297
If the area of a square of side x is 5, what is the area of a square [#permalink]

Show Tags

New post 08 Mar 2018, 02:16
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

79% (00:18) correct 21% (00:28) wrong based on 47 sessions

HideShow timer Statistics

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 46297
Re: If the area of a square of side x is 5, what is the area of a square [#permalink]

Show Tags

New post 08 Mar 2018, 02:17
Bunuel wrote:
If the area of a square of side x is 5, what is the area of a square of side 3x?

(A) 15

(B) 45

(C) 95

(D) 75

(E) 225


23. Geometry




24. Coordinate Geometry




25. Triangles




26. Polygons




27. Circles




28. Rectangular Solids and Cylinders




29. Graphs and Illustrations




For other subjects:
ALL YOU NEED FOR QUANT ! ! !
Ultimate GMAT Quantitative Megathread
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Expert Post
SVP
SVP
User avatar
P
Joined: 08 Jul 2010
Posts: 2115
Location: India
GMAT: INSIGHT
WE: Education (Education)
Reviews Badge
Re: If the area of a square of side x is 5, what is the area of a square [#permalink]

Show Tags

New post 08 Mar 2018, 05:25
Bunuel wrote:
If the area of a square of side x is 5, what is the area of a square of side 3x?

(A) 15

(B) 45

(C) 95

(D) 75

(E) 225


Area of square = side^2

i.e. \(x^2 = 5\)


Area of the square with side 3x = \((3x)^2= 9x^2 = 9*5 = 45\)

Answer: Option B
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Manager
Manager
avatar
S
Joined: 23 Sep 2016
Posts: 230
Premium Member Reviews Badge
Re: If the area of a square of side x is 5, what is the area of a square [#permalink]

Show Tags

New post 09 Mar 2018, 00:44
Bunuel wrote:
If the area of a square of side x is 5, what is the area of a square of side 3x?

(A) 15

(B) 45

(C) 95

(D) 75

(E) 225

IMO B area of square is side^2 so x^2=5 then x=root 5
3x=3root5
area of new square is 3x^2
3root5^2
=9*5=45
Senior Manager
Senior Manager
User avatar
P
Joined: 07 Jul 2012
Posts: 335
Location: India
Concentration: Finance, Accounting
GPA: 3.5
Re: If the area of a square of side x is 5, what is the area of a square [#permalink]

Show Tags

New post 09 Mar 2018, 20:48
Area of Square= \(x^2\)= 5

x= \(\sqrt{5}\)

Side of Square= 3x= 3\(\sqrt{5}\)

Area= \((3\sqrt{5})^2\)= 45

Answer: B.
_________________

Kindly hit kudos if my post helps!

Expert Post
Target Test Prep Representative
User avatar
G
Status: Head GMAT Instructor
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2570
Re: If the area of a square of side x is 5, what is the area of a square [#permalink]

Show Tags

New post 12 Mar 2018, 10:06
Bunuel wrote:
If the area of a square of side x is 5, what is the area of a square of side 3x?

(A) 15

(B) 45

(C) 95

(D) 75

(E) 225



We see that x^2 = 5, so x = √5.

Thus, 3x = 3√5, so the area of a side of 3x is (3√5)^2 = 9 x 5 = 45.

Alternate solution:

If a side of a square is increased by a factor of m, then its area is increased by a factor of m^2. Here, the side of the square is increased by a factor of 3, so the area will be increased by a factor of 3^2 = 9. Thus, the area of the square in question is 5 x 9 = 45.

Answer: B
_________________

Jeffery Miller
Head of GMAT Instruction

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Re: If the area of a square of side x is 5, what is the area of a square   [#permalink] 12 Mar 2018, 10:06
Display posts from previous: Sort by

If the area of a square of side x is 5, what is the area of a square

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


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

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

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.