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

It is currently 14 Nov 2018, 16:48

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 in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
  • $450 Tuition Credit & Official CAT Packs FREE

     November 15, 2018

     November 15, 2018

     10:00 PM MST

     11:00 PM MST

    EMPOWERgmat is giving away the complete Official GMAT Exam Pack collection worth $100 with the 3 Month Pack ($299)
  • Free GMAT Strategy Webinar

     November 17, 2018

     November 17, 2018

     07:00 AM PST

     09:00 AM PST

    Nov. 17, 7 AM PST. Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

Every disk in a bag is either blue, yellow or green.

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

Hide Tags

Current Student
User avatar
P
Status: It always seems impossible until it's done!!
Joined: 29 Aug 2012
Posts: 1120
Location: India
WE: General Management (Aerospace and Defense)
GMAT ToolKit User Premium Member Reviews Badge
Every disk in a bag is either blue, yellow or green.  [#permalink]

Show Tags

New post 08 Jul 2014, 06:38
1
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

92% (01:10) correct 8% (01:04) wrong based on 95 sessions

HideShow timer Statistics

Every disk in a bag is either blue, yellow or green. The ratio of blue disks to yellow disks to green disks in this bag is 3 : 7 : 8. If the total number of disks in the bag is 90, how many more green disks than blue disks are in the bag?

A. 25
B. 28
C. 30
D. 35
E. 40

_________________

Become a GMAT Club Premium member to avail lot of discounts

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 50585
Re: Every disk in a bag is either blue, yellow or green.  [#permalink]

Show Tags

New post 08 Jul 2014, 07:05
Gnpth wrote:
Every disk in a bag is either blue, yellow or green. The ratio of blue disks to yellow disks to green disks in this bag is 3 : 7 : 8. If the total number of disks in the bag is 90, how many more green disks than blue disks are in the bag?

A. 25
B. 28
C. 30
D. 35
E. 40


B:Y:G = 3x:7x:8x.

3x + 7x + 8x = 18x = 90 --> x= 5.

G - B = 8x - 3x = 5x = 25.

Answer: A.
_________________

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

SVP
SVP
User avatar
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1827
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Re: Every disk in a bag is either blue, yellow or green.  [#permalink]

Show Tags

New post 10 Jul 2014, 18:34
Blue ......... Yellow ........ Green ......... Total

3x ............... 7x ............. 8x ............... 90

Require to find 8x - 3x = 5x

18x = 90

\(5x = \frac{90}{18} * 5\)

= 25

Answer = A
_________________

Kindly press "+1 Kudos" to appreciate :)

Manager
Manager
avatar
Joined: 28 Apr 2014
Posts: 224
GMAT ToolKit User
Re: Every disk in a bag is either blue, yellow or green.  [#permalink]

Show Tags

New post 10 Jul 2014, 20:39
I would say sub 600.
Senior Manager
Senior Manager
User avatar
P
Joined: 08 Jun 2013
Posts: 468
Location: India
Schools: INSEAD Jan '19
GMAT 1: 200 Q1 V1
GPA: 3.82
WE: Engineering (Other)
GMAT ToolKit User Premium Member
Re: Every disk in a bag is either blue, yellow or green.  [#permalink]

Show Tags

New post 09 Sep 2018, 08:16
The ratio of blue disks to yellow disks to green disks in this bag is 3 : 7 : 8, which means that for every 3 blue disks, we have 7 yellow disks, and 8 green disks. Since this is a ratio, we can let the number of blue disks in the bag be 3x, the number of yellow disks be 7x, and the number of green disks be 8x. So 3x + 7x + 8x = 90. If we simplify the equation we get 18x = 90. We can then divide both sides by 18. So . In order to solve for the number of disks, replace x with 5. Therefore the number of green disks is 8x = 8(5) = 40 and the number of blue disks is 3x = 3(5) = 15. The number of green disks is greater than the number of blue disks by 40 - 15 = 25.
_________________

It seems Kudos button not working correctly with all my posts...

Please check if it is working with this post......

is it?....

Anyways...Thanks for trying :cool:

Manager
Manager
User avatar
G
Joined: 06 Sep 2018
Posts: 153
Location: Pakistan
Concentration: Finance, Operations
GPA: 2.87
WE: Engineering (Other)
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Re: Every disk in a bag is either blue, yellow or green.  [#permalink]

Show Tags

New post 09 Sep 2018, 08:24
As blue, yellow & green disks are in the ratio of \(3:7:8\), we have to find \(Green-Blue\),
so
\(blue=3x\)
\(yellow=7x\)
\(green=8x\)
as given: \(3x+7x+8x=90\)
\(18x=90\)
\(x=5\)
\(Green=8*5=40\)
\(Blue=3*5=15\)
\(Green-Blue=40-15=25\)

Answer A
_________________

Hitting Kudos is the best way of appreciation. :)

Eric Thomas, "When you want to succeed as bad as you want to breathe, then you'll be successful."

GMAT Club Bot
Re: Every disk in a bag is either blue, yellow or green. &nbs [#permalink] 09 Sep 2018, 08:24
Display posts from previous: Sort by

Every disk in a bag is either blue, yellow or green.

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


Copyright

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®.