It is currently 26 Jun 2017, 04:13

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If two copying machines work simultaneously at their

Author Message
TAGS:

### Hide Tags

Intern
Joined: 19 Nov 2011
Posts: 8
If two copying machines work simultaneously at their [#permalink]

### Show Tags

28 Jan 2012, 04:01
2
This post was
BOOKMARKED
00:00

Difficulty:

25% (medium)

Question Stats:

64% (01:31) correct 36% (00:36) wrong based on 239 sessions

### HideShow timer Statistics

If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?

(1) One of the machines produces copies at the constant rate of 250 copies per minute.
(2) One of the machines produces copies at twice the constant rate of the other machine.
[Reveal] Spoiler: OA

Last edited by Bunuel on 27 Feb 2012, 04:47, edited 2 times in total.
Added the OA and moved to DS subforum.
Math Expert
Joined: 02 Sep 2009
Posts: 39695

### Show Tags

28 Jan 2012, 04:13
Expert's post
3
This post was
BOOKMARKED
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?
(1) One of the machines produces copies at the constant rate of 250 copies per minute.
(2) One of the machines produces copies at twice the constant rate of the other machine.

Straight E, though a little bit tricky. All we need to know is the rates of these machines. Though from both statement the rates can be:
250 copies per minute and 500 copies per minute;
250 copies per minute and 125 copies per minute.

P.S. Please post PS questions in the PS subforum: gmat-problem-solving-ps-140/ and DS questions in the DS subforum: gmat-data-sufficiency-ds-141/
_________________
Manager
Joined: 23 Jan 2013
Posts: 172
Concentration: Technology, Other
Schools: Haas
GMAT Date: 01-14-2015
WE: Information Technology (Computer Software)
Re: If two copying machines work simultaneously at their [#permalink]

### Show Tags

04 Oct 2014, 10:08
Fell for the trap , one of the machines could mean either !!
GMAT Club Legend
Joined: 09 Sep 2013
Posts: 15978
Re: If two copying machines work simultaneously at their [#permalink]

### Show Tags

25 Jul 2016, 09:41
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Senior Manager
Joined: 02 Mar 2012
Posts: 367
Schools: Schulich '16
Re: If two copying machines work simultaneously at their [#permalink]

### Show Tags

26 Jul 2016, 00:52
very tricky and good question,

1) insuff .dont have info about 2nd machine
2) insuff again.dont have value for either machine's rate.

1+2, a bit tricky,

two cases :
1) 1st machine =250 ,2nd machine=500
2)1st machine =250, 2nd machine=125

Re: If two copying machines work simultaneously at their   [#permalink] 26 Jul 2016, 00:52
Similar topics Replies Last post
Similar
Topics:
15 Three machines, K, M, and P, working simultaneously and 10 03 Jun 2017, 13:38
3 Three machines, K, M, and P, working simultaneously and 3 01 Jul 2013, 00:03
6 Three machines, K, M, and P, working simultaneously and 8 22 May 2014, 05:21
2 If two copying machines work simultaneously at their 3 01 Nov 2016, 17:23
21 If two copying machines work simultaneously at their 16 13 Nov 2016, 06:45
Display posts from previous: Sort by