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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

If Company M ordered a total of 50 computers and printers an [#permalink]

Show Tags

29 Jan 2013, 11:38

9

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

25% (medium)

Question Stats:

69% (01:57) correct
31% (00:45) wrong based on 182 sessions

HideShow timer Statistics

If Company M ordered a total of 50 computers and printers and Company N ordered a total of 60 computers and printers, how many printers did company M order?

(1) Company M and Company N ordered the same number of computers (2) Company N ordered 10 more printers than Company M

Re: If Company M ordered a total of 50 computers and printers an [#permalink]

Show Tags

29 Jan 2013, 12:54

mjg2110 wrote:

Hi

I get stuck in this one! Why is not C the right answer??? Thanks!!

If company M ordered a total of 50 computers and printers and company N order a total of 60 computers and printers. How many computers does company M order?

1) Company M and N order the same number of computers 2) Company N order 10 computers more than M.

I found this q weird. For M, C(M) + P(M) = 50 For N, C(N)+ P(N) = 60

A does not say anything about printers for M and N. It can be 10 and 10, 20 and 20, 30 and 30 or any such combi B same issue as A On Combining, the info in both options is ambiguous. M and N computers are same where B says N has 10 more than M. How both of them can be true? _________________

If Company M ordered a total of 50 computers and printers and Company N ordered a total of 60 computers and printers, how many printers did company M order?

(1) Company M and Company N ordered the same number of computers (2) Company N ordered 10 more printers than Company M

I get stuck in this one! Why is not C the right answer???

Thanks!!

It's straight E. Consider the following cases:

#1: M ordered 5 computers and 45 printers, N ordered 5 computers and 55 printers; #2: M ordered 10 computers and 40 printers, N ordered 10 computers and 50 printers;

Re: If Company M ordered a total of 50 computers and printers an [#permalink]

Show Tags

23 Oct 2015, 08:21

This looks straight forward at first. From the question, two equations are introduced and four variables are introduced.

Then (1) and (2) each introduce what appears to be an additional equation so we have four equations and four variables.

At this point I selected answer C without solving assuming that our variable could be solved by rules of solvability with 4 equations. The problem is that the equation that (2) introduces is in fact identical to the information you already have. In essence it is not a new equation and thus you are still left with 4 variables and only 3 equations.

Does anyone have a more succinct way to explain this or identify this pattern in future problems?

This looks straight forward at first. From the question, two equations are introduced and four variables are introduced.

Then (1) and (2) each introduce what appears to be an additional equation so we have four equations and four variables.

At this point I selected answer C without solving assuming that our variable could be solved by rules of solvability with 4 equations. The problem is that the equation that (2) introduces is in fact identical to the information you already have. In essence it is not a new equation and thus you are still left with 4 variables and only 3 equations.

Does anyone have a more succinct way to explain this or identify this pattern in future problems?

The rule is that you need to have n "distinct" equations to solve to "n" variables. This is especially true for DS questions. Do not mark C or E in DS questions without actually loooking at the equations you get either from the question stem and the statements. This is the "pattern" you are talking about.

You get the same equations of \(C_m + P_m = 50\) from the question stem+2 statements combined.

Thus, be very careful in DS questions when you are given 'n' variables and 'n' equations. These equations must be distinct to give any unique value.

Re: If Company M ordered a total of 50 computers and printers an [#permalink]

Show Tags

23 Oct 2015, 13:00

Engr2012 wrote:

jbburf wrote:

This looks straight forward at first. From the question, two equations are introduced and four variables are introduced.

Then (1) and (2) each introduce what appears to be an additional equation so we have four equations and four variables.

At this point I selected answer C without solving assuming that our variable could be solved by rules of solvability with 4 equations. The problem is that the equation that (2) introduces is in fact identical to the information you already have. In essence it is not a new equation and thus you are still left with 4 variables and only 3 equations.

Does anyone have a more succinct way to explain this or identify this pattern in future problems?

The rule is that you need to have n "distinct" equations to solve to "n" variables. This is especially true for DS questions. Do not mark C or E in DS questions without actually loooking at the equations you get either from the question stem and the statements. This is the "pattern" you are talking about.

You get the same equations of \(C_m + P_m = 50\) from the question stem+2 statements combined.

Thus, be very careful in DS questions when you are given 'n' variables and 'n' equations. These equations must be distinct to give any unique value.

Hope this helps.

Well said, and thank you for the response. The problem here was that an additional equation was introduced but it was not distinct.

Re: If Company M ordered a total of 50 computers and printers an [#permalink]

Show Tags

21 Jan 2016, 02:02

mjg2110 wrote:

If Company M ordered a total of 50 computers and printers and Company N ordered a total of 60 computers and printers, how many printers did company M order?

(1) Company M and Company N ordered the same number of computers (2) Company N ordered 10 more printers than Company M

I get stuck in this one! Why is not C the right answer???

Thanks!!

Admins can you please edit this question take this part out "I get stuck in this one!Why is not C the right answer??? " sothat one cannot see the answer. Thanks.

Company M: a+b=50, Company N: x+y=60, b=?

(1) a=x, ok, y-b=10, not sufficient (2) y=b+10 same information as above, not sufficient (1)+(2) We have twice the same info, so still not sufficient.

Answer E _________________

When you’re up, your friends know who you are. When you’re down, you know who your friends are.

Share some Kudos, if my posts help you. Thank you !

Re: If Company M ordered a total of 50 computers and printers an [#permalink]

Show Tags

23 Jun 2016, 03:36

Bunuel wrote:

mjg2110 wrote:

If Company M ordered a total of 50 computers and printers and Company N ordered a total of 60 computers and printers, how many printers did company M order?

(1) Company M and Company N ordered the same number of computers (2) Company N ordered 10 more printers than Company M

I get stuck in this one! Why is not C the right answer???

Thanks!!

It's straight E. Consider the following cases:

#1: M ordered 5 computers and 45 printers, N ordered 5 computers and 55 printers; #2: M ordered 10 computers and 40 printers, N ordered 10 computers and 50 printers;

Hey! I am also stuck with this question. The above statements that you mentioned didn't give us a unique answer on their own. But when i am combining them, i am using this approach and reaching to an answer.

Let (M computers) MC = x therefore, (M Printers) MP = 50-x .......(eq1) On other hand NC = y and NP= 60-y

Now statement 1 says : x=y ie. Company M and N ordered same number of computer. Thus NP becomes 60-x (because NP WAS "60-y" and now x=y) so now, NP= 60-x .........(eq2)

statement 2 says: NP=10MP

Now combining 1 and 2 gives us: ie (60-x) = 10(50-x)

If Company M ordered a total of 50 computers and printers and Company N ordered a total of 60 computers and printers, how many printers did company M order?

(1) Company M and Company N ordered the same number of computers (2) Company N ordered 10 more printers than Company M

I get stuck in this one! Why is not C the right answer???

Thanks!!

It's straight E. Consider the following cases:

#1: M ordered 5 computers and 45 printers, N ordered 5 computers and 55 printers; #2: M ordered 10 computers and 40 printers, N ordered 10 computers and 50 printers;

Hey! I am also stuck with this question. The above statements that you mentioned didn't give us a unique answer on their own. But when i am combining them, i am using this approach and reaching to an answer.

Let (M computers) MC = x therefore, (M Printers) MP = 50-x .......(eq1) On other hand NC = y and NP= 60-y

Now statement 1 says : x=y ie. Company M and N ordered same number of computer. Thus NP becomes 60-x (because NP WAS "60-y" and now x=y) so now, NP= 60-x .........(eq2)

statement 2 says: NP=10MP

Now combining 1 and 2 gives us: ie (60-x) = 10(50-x)

Please help

(2) says: Company N ordered 10 more printers than Company M, not 10 times as many. _________________

Re: If Company M ordered a total of 50 computers and printers an [#permalink]

Show Tags

23 Jun 2016, 09:28

Straight E (1) M and N bought same number of computer = {Both 20 computers} or {30 computers} or {40 computers} ..etc etc. Cannot find no. of printers by this information INSUFFICIENT (2) N bought 10 more printers than N= {M-30 N-40} or {M-44 N-54} or {M-1 N-11} No. of printers is again variable INSUFFICIENT

COMBINE MC & NC=25 MP=25 NP=35 [MP+MC= 50 NP+NC=60] or MC & NC=10 MP=40 NP=50 [MP+MC= 50 NP+NC=60] or MC & NC=1 MP=49 NP=59 [MP+MC= 50 NP+NC=60] or MC & NC=0 MP=50 NP=60 [MP+MC= 50 NP+NC=60]

Even afer combining the two statements number of printers that company M bought can be anything from 1 to 50

HENCE 0

DO NOT BE AFRAID TO CHOOSE E WHEN CALCULATIONS OBVIOUSLY POINTS THAT THE OPTION IS INDEED E

mjg2110 wrote:

If Company M ordered a total of 50 computers and printers and Company N ordered a total of 60 computers and printers, how many printers did company M order?

(1) Company M and Company N ordered the same number of computers (2) Company N ordered 10 more printers than Company M

I get stuck in this one! Why is not C the right answer???

Thanks!!

_________________

Posting an answer without an explanation is "GOD COMPLEX". The world does't need any more gods. Please explain you answers properly. DreamingDetermination+Dedication+Obsession=ABSOLUTE SUCCESS

Re: If Company M ordered a total of 50 computers and printers an [#permalink]

Show Tags

02 Aug 2016, 01:31

mjg2110 wrote:

If Company M ordered a total of 50 computers and printers and Company N ordered a total of 60 computers and printers, how many printers did company M order?

(1) Company M and Company N ordered the same number of computers (2) Company N ordered 10 more printers than Company M

I get stuck in this one! Why is not C the right answer???

Thanks!!

From stimulus mp+mc=50 np+nc=60 (1) Company M and Company N ordered the same number of computers 2*c +mp+np=110 ------------------> because (50+60=110) INSUFFICIENT (2) Company N ordered 10 more printers than Company M mc+nc+2p=100--------------------------->because (110-10=100) INSUFFICIENT

ADDING BOTH STATEMENTS 2C+2P=210 C+P=105

CANNOT FIGURE INDIVIDUAL VALUE OF COMPUTER AND PRINTERS

INSUFFICIENT

E IS ANSWER _________________

Posting an answer without an explanation is "GOD COMPLEX". The world does't need any more gods. Please explain you answers properly. DreamingDetermination+Dedication+Obsession=ABSOLUTE SUCCESS

gmatclubot

Re: If Company M ordered a total of 50 computers and printers an
[#permalink]
02 Aug 2016, 01:31

This is the kickoff for my 2016-2017 application season. After a summer of introspect and debate I have decided to relaunch my b-school application journey. Why would anyone want...

Check out this awesome article about Anderson on Poets Quants, http://poetsandquants.com/2015/01/02/uclas-anderson-school-morphs-into-a-friendly-tech-hub/ . Anderson is a great place! Sorry for the lack of updates recently. I...

“Oh! Looks like your passport expires soon” – these were the first words at the airport in London I remember last Friday. Shocked that I might not be...