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

It is currently 19 Feb 2019, 18:13

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 February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Free GMAT Prep Hour

     February 20, 2019

     February 20, 2019

     08:00 PM EST

     09:00 PM EST

    Strategies and techniques for approaching featured GMAT topics. Wednesday, February 20th at 8 PM EST
  • Online GMAT boot camp for FREE

     February 21, 2019

     February 21, 2019

     10:00 PM PST

     11:00 PM PST

    Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.

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: Chasing my MBB Dream!
Joined: 29 Aug 2012
Posts: 1118
Location: United States (DC)
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:

93% (01:11) correct 7% (01:04) wrong based on 99 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: 52971
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: 1821
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: 208
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.
Director
Director
User avatar
P
Joined: 08 Jun 2013
Posts: 555
Location: France
Schools: INSEAD Jan '19
GMAT 1: 200 Q1 V1
GPA: 3.82
WE: Consulting (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.
_________________

Everything will fall into place…

There is perfect timing for
everything and everyone.
Never doubt, But Work on
improving yourself,
Keep the faith and
Stay ready. When it’s
finally your turn,
It will all make sense.

Manager
Manager
User avatar
G
Joined: 06 Sep 2018
Posts: 176
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.   [#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®.