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

It is currently 23 Jan 2019, 23:28

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 in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • Key Strategies to Master GMAT SC

     January 26, 2019

     January 26, 2019

     07:00 AM PST

     09:00 AM PST

    Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.
  • Free GMAT Number Properties Webinar

     January 27, 2019

     January 27, 2019

     07:00 AM PST

     09:00 AM PST

    Attend this webinar to learn a structured approach to solve 700+ Number Properties question in less than 2 minutes.

At Gallicum Enterprises, all employees are in one of three categories:

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

Hide Tags

 
SC Moderator
User avatar
V
Joined: 23 Sep 2015
Posts: 1626
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
At Gallicum Enterprises, all employees are in one of three categories:  [#permalink]

Show Tags

New post 31 May 2018, 04:27
1
4
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

86% (02:03) correct 14% (02:47) wrong based on 66 sessions

HideShow timer Statistics

At Gallicum Enterprises, all employees are in one of three categories: J, K, or L. The ratio of the numbers of employees in J to K to L has been 1:3:5 for some time. Last month, 20 new J employees were hired, and no employees left. If the new ratio of J to K is now 1:2 with these new J employees, what is the new total number of employees at Gallicum Enterprises?

A. 180
B. 240
C. 260
D. 320
E. 380

_________________

Thanks!
Do give some kudos.

Simple strategy:
“Once you’ve eliminated the impossible, whatever remains, however improbable, must be the truth.”

Want to improve your Score:
GMAT Ninja YouTube! Series 1| GMAT Ninja YouTube! Series 2 | How to Improve GMAT Quant from Q49 to a Perfect Q51

My Notes:
Reading comprehension | Critical Reasoning | Absolute Phrases | Subjunctive Mood

Manager
Manager
User avatar
S
Joined: 28 Nov 2017
Posts: 145
Location: Uzbekistan
Premium Member
At Gallicum Enterprises, all employees are in one of three categories:  [#permalink]

Show Tags

New post 31 May 2018, 04:58
aragonn wrote:
At Gallicum Enterprises, all employees are in one of three categories: J, K, or L. The ratio of the numbers of employees in J to K to L has been 1:3:5 for some time. Last month, 20 new J employees were hired, and no employees left. If the new ratio of J to K is now 1:2 with these new J employees, what is the new total number of employees at Gallicum Enterprises?

A. 180
B. 240
C. 260
D. 320
E. 380


Initial number of \(J\), \(K\) and \(L\) employees is \(x\), \(3x\) and \(5x\) respectively.
New number of \(J\), \(K\) and \(L\) employees is \(x+20\), \(3x\) and \(5x\) respectively.

Question stem says that \(\frac{x+20}{3x}=\frac{1}{2}\). So, \(x=40\).

New total number of employees is \(x+3x+5x+20=9*40+20=380\).

Answer: E
_________________

Kindest Regards!
Tulkin.

Senior PS Moderator
User avatar
V
Joined: 26 Feb 2016
Posts: 3334
Location: India
GPA: 3.12
Premium Member CAT Tests
Re: At Gallicum Enterprises, all employees are in one of three categories:  [#permalink]

Show Tags

New post 31 May 2018, 05:09
2
1
aragonn wrote:
At Gallicum Enterprises, all employees are in one of three categories: J, K, or L. The ratio of the numbers of employees in J to K to L has been 1:3:5 for some time. Last month, 20 new J employees were hired, and no employees left. If the new ratio of J to K is now 1:2 with these new J employees, what is the new total number of employees at Gallicum Enterprises?

A. 180
B. 240
C. 260
D. 320
E. 380


If we reduce each of the answer options by 20 employees who have joined
last month, the number of employees must be divisible by 1+3+5 = 9

Testing answer options
A. 180 - 20 = \(\frac{160}{9}\) = Not an integer
B. 240 - 20 = \(\frac{220}{9}\) = Not an integer
C. 260 - 20 = \(\frac{240}{9}\) = Not an integer
D. 320 - 20 = \(\frac{300}{9}\) = Not an integer

E. 380 - 20 = \(\frac{360}{9}\) = Integer (Option E)
_________________

You've got what it takes, but it will take everything you've got

SC Moderator
User avatar
V
Joined: 23 Sep 2015
Posts: 1626
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Re: At Gallicum Enterprises, all employees are in one of three categories:  [#permalink]

Show Tags

New post 31 May 2018, 05:18
pushpitkc wrote:
If we reduce each of the answer options by 20 employees who have joined
last month, the number of employees must be divisible by 1+3+5 = 9

Testing answer options
A. 180 - 20 = \(\frac{160}{9}\) = Not an integer
B. 240 - 20 = \(\frac{220}{9}\) = Not an integer
C. 260 - 20 = \(\frac{240}{9}\) = Not an integer
D. 320 - 20 = \(\frac{300}{9}\) = Not an integer

E. 380 - 20 = \(\frac{360}{9}\) = Integer (Option E)


Interesting answer, I haven't thought about this one. good learning for sure.
_________________

Thanks!
Do give some kudos.

Simple strategy:
“Once you’ve eliminated the impossible, whatever remains, however improbable, must be the truth.”

Want to improve your Score:
GMAT Ninja YouTube! Series 1| GMAT Ninja YouTube! Series 2 | How to Improve GMAT Quant from Q49 to a Perfect Q51

My Notes:
Reading comprehension | Critical Reasoning | Absolute Phrases | Subjunctive Mood

Intern
Intern
avatar
B
Joined: 02 May 2018
Posts: 14
GMAT 1: 660 Q49 V31
At Gallicum Enterprises, all employees are in one of three categories:  [#permalink]

Show Tags

New post 31 May 2018, 10:15
This one is a Reverse Plugging In question.

We can see that the parts J, K and L add up to 9. Thus, the initial total number of employees should be divisible by 9.

Subtract the amount of newcomers (20) from the answer choices and get the following numbers: 160, 220, 240, 300, 360. Clearly, only 360 is divisible by 9 out of these 5 numbers.

Just to be sure, it may be wise to check the option. If there are 360 total employees, then there are \(\frac{1}{9}*360 = 40\) employees working for J. Consequently, \(40* 3 = 120\) and \(40 * 5 = 200\) employees working for K and L respectively.

If we add 20 employees to the J division, the number of employees in J is 60. Hence the new ration of J to K is indeed 1:2, because 60:120 is 1:2. Thus, E is the correct answer.
Target Test Prep Representative
User avatar
G
Status: Head GMAT Instructor
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2830
Re: At Gallicum Enterprises, all employees are in one of three categories:  [#permalink]

Show Tags

New post 01 Jun 2018, 10:19
aragonn wrote:
At Gallicum Enterprises, all employees are in one of three categories: J, K, or L. The ratio of the numbers of employees in J to K to L has been 1:3:5 for some time. Last month, 20 new J employees were hired, and no employees left. If the new ratio of J to K is now 1:2 with these new J employees, what is the new total number of employees at Gallicum Enterprises?

A. 180
B. 240
C. 260
D. 320
E. 380


We have the ratio of:

J : K : L = x : 3x : 5x, and so the original total number of employees is x + 3x + 5x = 9x.

Last month, 20 new J employees were hired, and no employees left, and the new ratio of J to K is 1:2 with these new J employees:

(x + 20)/3x = 1/2

2(x + 20) = 3x

2x + 40 = 3x

x = 40

The original number of employees was 9x = 9(40) = 360. So the new number of employees is 360 + 20 = 380,

Answer: E
_________________

Jeffery Miller
Head of GMAT Instruction

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

GMAT Club Bot
Re: At Gallicum Enterprises, all employees are in one of three categories: &nbs [#permalink] 01 Jun 2018, 10:19
Display posts from previous: Sort by

At Gallicum Enterprises, all employees are in one of three categories:

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


cron
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®.