It is currently 16 Jan 2018, 14:49

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

How many minutes would it take Guy to complete 15X2 phone calls at a c

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

Hide Tags

Retired Moderator
avatar
Joined: 29 Apr 2015
Posts: 888

Kudos [?]: 1988 [0], given: 302

Location: Switzerland
Concentration: Economics, Finance
Schools: LBS MIF '19
WE: Asset Management (Investment Banking)
GMAT ToolKit User Premium Member
How many minutes would it take Guy to complete 15X2 phone calls at a c [#permalink]

Show Tags

New post 15 May 2015, 06:19
7
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

49% (01:09) correct 51% (01:13) wrong based on 232 sessions

HideShow timer Statistics

How many minutes would it take Guy to complete 15X2 phone calls at a constant rate?

(1) Guy takes X minutes to complete each phone call.
(2) Every minute, Guy completes X phone calls.
[Reveal] Spoiler: OA

_________________

Saving was yesterday, heat up the gmatclub.forum's sentiment by spending KUDOS!

PS Please send me PM if I do not respond to your question within 24 hours.


Last edited by Bunuel on 18 May 2015, 03:41, edited 1 time in total.
Edited the question.

Kudos [?]: 1988 [0], given: 302

Expert Post
3 KUDOS received
Veritas Prep GMAT Instructor
User avatar
Joined: 23 Oct 2013
Posts: 144

Kudos [?]: 287 [3], given: 9

Re: How many minutes would it take Guy to complete 15X2 phone calls at a c [#permalink]

Show Tags

New post 17 May 2015, 17:58
3
This post received
KUDOS
Expert's post
Here the answer lies in the fact that those 2 statements together mean that X must be 1. If he completes x phones calls/minute AND takes x minutes to complete each phone call, the only possible value for X is 1. Knowing that, the question is asking us how long it takes him to complete 1,512 phone calls, if he completes 1 phone call each minute. Therefore together they are sufficient (it will take him 1,512 minutes), and the answer choice is C.

I hope this helps!
_________________

Brandon
Veritas Prep | GMAT Instructor

If you found this post helpful, please give me kudos!!! :)

Save $100 on Veritas Prep GMAT Courses And Admissions Consulting
Enroll now. Pay later. Take advantage of Veritas Prep's flexible payment plan options.

Veritas Prep Reviews

Kudos [?]: 287 [3], given: 9

1 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 02 Dec 2014
Posts: 370

Kudos [?]: 99 [1], given: 349

Location: Russian Federation
Concentration: General Management, Economics
GMAT 1: 640 Q44 V33
WE: Sales (Telecommunications)
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c [#permalink]

Show Tags

New post 04 Jun 2015, 14:36
1
This post received
KUDOS
It took me some time to understand why each statement alone is not sufficient. But to be honest i don't like this question. Moreover, i couldn't understand at first what is "15X2". Quite ambiguous.
_________________

"Are you gangsters?" - "No we are Russians!"

Kudos [?]: 99 [1], given: 349

Current Student
avatar
Joined: 29 Mar 2015
Posts: 41

Kudos [?]: 10 [0], given: 3

Location: India
GMAT ToolKit User
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c [#permalink]

Show Tags

New post 05 Jun 2015, 23:58
Konstantin1983 wrote:
It took me some time to understand why each statement alone is not sufficient. But to be honest i don't like this question. Moreover, i couldn't understand at first what is "15X2". Quite ambiguous.


Try plugging in random numbers in place of "15X2", in each case your answer will still be 1. As far as the question is concerned, I share your sentiments.

Kudos [?]: 10 [0], given: 3

Senior Manager
Senior Manager
avatar
Joined: 15 Sep 2011
Posts: 358

Kudos [?]: 443 [0], given: 46

Location: United States
WE: Corporate Finance (Manufacturing)
GMAT ToolKit User
How many minutes would it take Guy to complete 15X2 phone calls at a c [#permalink]

Show Tags

New post 19 Sep 2015, 14:48
I agree, understanding what 15X2 means was confusing, and the first statement one minutes isn't grammatically correct. Perhaps if variable was further defined in the question stem with "if x is an integer" then it might have helped in what was being asked. I was trying to decide if it were an operator or an integer.. Anyhow, good mental exercise nonetheless

Kr,
Mejia

Kudos [?]: 443 [0], given: 46

Senior Manager
Senior Manager
avatar
S
Joined: 15 Jan 2017
Posts: 360

Kudos [?]: 7 [0], given: 830

CAT Tests
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c [#permalink]

Show Tags

New post 31 Dec 2017, 09:30
To be fiar you'd a get D too not just C.
x min --> 1 call
15x2 --> 15X2*1/X = 30

Same for statement 2.
would be glad to know the error in reasoning here.

Kudos [?]: 7 [0], given: 830

PS Forum Moderator
avatar
P
Joined: 25 Feb 2013
Posts: 806

Kudos [?]: 378 [0], given: 42

Location: India
GPA: 3.82
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c [#permalink]

Show Tags

New post 31 Dec 2017, 09:35
Madhavi1990 wrote:
To be fiar you'd a get D too not just C.
x min --> 1 call
15x2 --> 15X2*1/X = 30

Same for statement 2.
would be glad to know the error in reasoning here.


Hi Madhavi1990

Statement 2 says that every Minute the guy completes X calls. So in 1 minute I can make more than 1 call so X>=1. for eg. I can make 2 calls of 30 secs each. Hence B will not be the answer

Kudos [?]: 378 [0], given: 42

Senior Manager
Senior Manager
avatar
S
Joined: 15 Jan 2017
Posts: 360

Kudos [?]: 7 [0], given: 830

CAT Tests
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c [#permalink]

Show Tags

New post 31 Dec 2017, 09:40
niks18 wrote:
Madhavi1990 wrote:
To be fiar you'd a get D too not just C.
x min --> 1 call
15x2 --> 15X2*1/X = 30

Same for statement 2.
would be glad to know the error in reasoning here.


Hi Madhavi1990

Statement 2 says that every Minute the guy completes X calls. So in 1 minute I can make more than 1 call so X>=1. for eg. I can make 2 calls of 30 secs each. Hence B will not be the answer



Thank you, I saw my error :) Have to read carefully

Kudos [?]: 7 [0], given: 830

Re: How many minutes would it take Guy to complete 15X2 phone calls at a c   [#permalink] 31 Dec 2017, 09:40
Display posts from previous: Sort by

How many minutes would it take Guy to complete 15X2 phone calls at a c

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


GMAT Club MBA Forum Home| About| Terms and Conditions| 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®.