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

It is currently 17 Aug 2018, 10:14

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

Given that a “12-inch pizza” means circular pizza with a diameter of 1

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47967
Given that a “12-inch pizza” means circular pizza with a diameter of 1  [#permalink]

Show Tags

New post 02 Mar 2015, 08:23
1
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

74% (00:54) correct 26% (00:45) wrong based on 123 sessions

HideShow timer Statistics

Given that a “12-inch pizza” means circular pizza with a diameter of 12 inches, changing from an 8-inch pizza to a 12-inch pizza gives you approximately what percent increase in the total amount of pizza?

(A) 33
(B) 50
(C) 67
(D) 80
(E) 125


Kudos for a correct solution.

_________________

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

Manager
Manager
User avatar
Status: Gmat Prep
Joined: 22 Jul 2011
Posts: 74
GMAT ToolKit User
Re: Given that a “12-inch pizza” means circular pizza with a diameter of 1  [#permalink]

Show Tags

New post 02 Mar 2015, 09:10
1
area of 8 inch pizza= 4*4*pi=16 pi
area of 12 inch pizza =6*6*pi=36 pi

20/16*100=125% increase

36> 32(100% increase) hence its greater than 100% hence its option E as its only option with 100+ hence answer is E
Senior Manager
Senior Manager
User avatar
B
Joined: 28 Feb 2014
Posts: 295
Location: United States
Concentration: Strategy, General Management
Reviews Badge
Re: Given that a “12-inch pizza” means circular pizza with a diameter of 1  [#permalink]

Show Tags

New post 02 Mar 2015, 19:08
1
Bunuel wrote:
Given that a “12-inch pizza” means circular pizza with a diameter of 12 inches, changing from an 8-inch pizza to a 12-inch pizza gives you approximately what percent increase in the total amount of pizza?

(A) 33
(B) 50
(C) 67
(D) 80
(E) 125


Kudos for a correct solution.


(36\({pi}\)-16\({pi}\))/(16\({pi}\)) = 5/4

125%

Answer: E
SVP
SVP
User avatar
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1835
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Re: Given that a “12-inch pizza” means circular pizza with a diameter of 1  [#permalink]

Show Tags

New post 02 Mar 2015, 22:25
1
Answer = E = 125

Area \(= \pi r^2\) ( \(\pi\) is constant, no need not be considered for the required calculation)

Variable increase is from \(4^2 to 6^2\)

Percent increase \(=\frac{(36-16)*100}{16} = 125\)
_________________

Kindly press "+1 Kudos" to appreciate :)

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47967
Re: Given that a “12-inch pizza” means circular pizza with a diameter of 1  [#permalink]

Show Tags

New post 08 Mar 2015, 14:05
1
Bunuel wrote:
Given that a “12-inch pizza” means circular pizza with a diameter of 12 inches, changing from an 8-inch pizza to a 12-inch pizza gives you approximately what percent increase in the total amount of pizza?

(A) 33
(B) 50
(C) 67
(D) 80
(E) 125


Kudos for a correct solution.


MAGOOSH OFFICIAL SOLUTION:

The 8-inch pizza has a radius of r = 4, so the area is \(A=16\pi\). That area is how much pizza you get. The 12-inch pizza has a radius of r = 6 and an area of \(A=36\pi\). When you change from 16 to 36, what is the percentage change? Well, that’s more than double, so it must be a percent greater than 100%. The only answer choice greater than 100% is answer E.
_________________

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

Intern
Intern
avatar
B
Joined: 24 Oct 2016
Posts: 25
GMAT ToolKit User
Given that a “12-inch pizza” means circular pizza with a diameter of 1  [#permalink]

Show Tags

New post 15 Oct 2017, 04:28
A diameter of 12 means a radius of 6 and an area of 36π.
A diameter of 8 means a radius of 4 and an area of 16π.

An increase of 125% from 16π to 36π.

E.
Given that a “12-inch pizza” means circular pizza with a diameter of 1 &nbs [#permalink] 15 Oct 2017, 04:28
Display posts from previous: Sort by

Given that a “12-inch pizza” means circular pizza with a diameter of 1

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

Events & Promotions

PREV
NEXT


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®.