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

 It is currently 19 Aug 2018, 19:59

### 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

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

# 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
Joined: 29 Apr 2015
Posts: 862
Location: Switzerland
Concentration: Economics, Finance
Schools: LBS MIF '19
WE: Asset Management (Investment Banking)
How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

Updated on: 29 May 2018, 09:17
1
8
00:00

Difficulty:

85% (hard)

Question Stats:

46% (01:10) correct 54% (01:13) wrong based on 334 sessions

### HideShow timer Statistics

How many minutes would it take Guy to complete $$15X^2$$ phone calls at a constant rate?

(1) Guy takes X minutes to complete each phone call.
(2) Every minute, Guy completes X phone calls.

_________________

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.

Originally posted by reto on 15 May 2015, 07:19.
Last edited by abhimahna on 29 May 2018, 09:17, edited 2 times in total.
Edited the question.
Veritas Prep GMAT Instructor
Joined: 23 Oct 2013
Posts: 144
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

17 May 2015, 18:58
5
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

##### General Discussion
Senior Manager
Joined: 02 Dec 2014
Posts: 385
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

04 Jun 2015, 15:36
1
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!"

Intern
Joined: 29 Mar 2015
Posts: 41
Location: India
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

06 Jun 2015, 00:58
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.
Senior Manager
Joined: 15 Sep 2011
Posts: 342
Location: United States
WE: Corporate Finance (Manufacturing)
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

19 Sep 2015, 15:48
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
Senior Manager
Joined: 15 Jan 2017
Posts: 367
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

31 Dec 2017, 10:30
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.
PS Forum Moderator
Joined: 25 Feb 2013
Posts: 1203
Location: India
GPA: 3.82
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

31 Dec 2017, 10:35
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.

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
Senior Manager
Joined: 15 Jan 2017
Posts: 367
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

31 Dec 2017, 10:40
niks18 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.

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
Intern
Joined: 04 Oct 2017
Posts: 41
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

18 Jan 2018, 19:31
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.

I understood it as 15X2 = 30 and was wondering it could be written as 30....
DS Forum Moderator
Joined: 22 Aug 2013
Posts: 1343
Location: India
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

18 Jan 2018, 23:07
Kezia9 wrote:
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.

I understood it as 15X2 = 30 and was wondering it could be written as 30....

Hi

GMAT questions will not have ambiguity. If the intention of the question is to give you 30, they will NOT write it as 15X2 or even 15*2, it will be clearly mentioned. While I agree this question is slightly ambiguous, GMAT will take care of this. GMAT questions will try to trap us using means such as close options, common mistakes, incorrect comprehension, but NOT using ambiguity or misleading information
Senior Manager
Joined: 29 Dec 2017
Posts: 338
Location: United States
Concentration: Marketing, Technology
GMAT 1: 630 Q44 V33
GMAT 2: 690 Q47 V37
GPA: 3.25
WE: Marketing (Telecommunications)
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

29 May 2018, 09:06
reto wrote:
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.

The author of the topic made a typo, the $$15X^2$$ would resolve the issue.
_________________

I'm looking for a study buddy in NY, who is aiming at 700+. PM me.

Board of Directors
Status: Stepping into my 10 years long dream
Joined: 18 Jul 2015
Posts: 3690
Re: How many minutes would it take Guy to complete 15X2 phone calls at a c  [#permalink]

### Show Tags

29 May 2018, 09:21
Hero8888 wrote:
The author of the topic made a typo, the $$15X^2$$ would resolve the issue.

Hey Hero8888 ,

This has been resolved now. Thanks for reporting!
_________________

My GMAT Story: From V21 to V40
My MBA Journey: My 10 years long MBA Dream
My Secret Hacks: Best way to use GMATClub | Importance of an Error Log!
Verbal Resources: All SC Resources at one place | All CR Resources at one place

GMAT Club Inbuilt Error Log Functionality - View More.
New Visa Forum - Ask all your Visa Related Questions - here.

Find a bug in the new email templates and get rewarded with 2 weeks of GMATClub Tests for free

Re: How many minutes would it take Guy to complete 15X2 phone calls at a c &nbs [#permalink] 29 May 2018, 09:21
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

# Events & Promotions

 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®.