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:

In a certain neighborhood there are half as many beige house [#permalink]

Show Tags

09 Feb 2013, 13:03

1

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

25% (medium)

Question Stats:

64% (01:49) correct
36% (00:58) wrong based on 153 sessions

HideShow timer Statistics

In a certain neighborhood there are half as many beige houses as white houses and five times as many white houses as brown houses. What is the ratio of the number of brown houses to the number of beige houses?

This is a pure ratio question, so there's no harm in picking a number for something if that makes things easier for you. If we have 10 white houses, we have 5 beige houses and 2 brown houses. So the answer is 2:5.
_________________

GMAT Tutor in Toronto

If you are looking for online GMAT math tutoring, or if you are interested in buying my advanced Quant books and problem sets, please contact me at ianstewartgmat at gmail.com

Re: In a certain neighborhood there are half as many beige house [#permalink]

Show Tags

27 Feb 2013, 14:38

megafan wrote:

In a certain neighborhood there are half as many beige houses as white houses and five times as many white houses as brown houses. What is the ratio of the number of brown houses to the number of beige houses?

(A) 1:10

(B) 1:9

(C) 2:5

(D) 5:2

(E) 10:1

Source: Gmat Hacks 1800

I usually do not have any problem with ratios.. but there are few which trouble me a lot. The above one use word 'as many'.

I read the problem and got the answer 5:2. I interpreted "half no. of beige = total no. of white & 5 times the no. of white = total no. of brown'.

The ans suggest otherwise. Could some one explain, how to interpret them correctly.

In a certain neighborhood there are half as many beige houses as white houses and five times as many white houses as brown houses. What is the ratio of the number of brown houses to the number of beige houses?

(A) 1:10

(B) 1:9

(C) 2:5

(D) 5:2

(E) 10:1

Source: Gmat Hacks 1800

I usually do not have any problem with ratios.. but there are few which trouble me a lot. The above one use word 'as many'.

I read the problem and got the answer 5:2. I interpreted "half no. of beige = total no. of white & 5 times the no. of white = total no. of brown'.

The ans suggest otherwise. Could some one explain, how to interpret them correctly.

Thanks,

If I tell you, "I have five times as many problems as you do," what does it mean? Do I have more problems or do you? I hope you will agree that I have more problems. Similarly, I have half as many books as you means that I have fewer books.

Now look at the question:

"there are half as many beige houses as white houses" - implies Beige:White = 1:2 (There are fewer Beige houses)

"there are five times as many white houses as brown houses" - implies White:Brown = 5:1 (There are more White houses)

Re: In a certain neighborhood there are half as many beige house [#permalink]

Show Tags

28 Feb 2013, 11:42

VeritasPrepKarishma wrote:

If I tell you, "I have five times as many problems as you do," what does it mean? Do I have more problems or do you? I hope you will agree that I have more problems. Similarly, I have half as many books as you means that I have fewer books.

Now look at the question:

"there are half as many beige houses as white houses" - implies Beige:White = 1:2 (There are fewer Beige houses)

"there are five times as many white houses as brown houses" - implies White:Brown = 5:1 (There are more White houses)

Hence, Beige:White:Brown = 5:10:2

Thanks for your reply. The moment you used the missing word 'times'. The problem was crystal clear. I will always assume the times word if not mentioned.

Re: In a certain neighborhood there are half as many beige house [#permalink]

Show Tags

28 Feb 2013, 16:50

VeritasPrepKarishma wrote:

hikaps14 wrote:

megafan wrote:

In a certain neighborhood there are half as many beige houses as white houses and five times as many white houses as brown houses. What is the ratio of the number of brown houses to the number of beige houses?

(A) 1:10

(B) 1:9

(C) 2:5

(D) 5:2

(E) 10:1

Source: Gmat Hacks 1800

I usually do not have any problem with ratios.. but there are few which trouble me a lot. The above one use word 'as many'.

I read the problem and got the answer 5:2. I interpreted "half no. of beige = total no. of white & 5 times the no. of white = total no. of brown'.

The ans suggest otherwise. Could some one explain, how to interpret them correctly.

Thanks,

If I tell you, "I have five times as many problems as you do," what does it mean? Do I have more problems or do you? I hope you will agree that I have more problems. Similarly, I have half as many books as you means that I have fewer books.

Now look at the question:

"there are half as many beige houses as white houses" - implies Beige:White = 1:2 (There are fewer Beige houses)

"there are five times as many white houses as brown houses" - implies White:Brown = 5:1 (There are more White houses)

Hence, Beige:White:Brown = 5:10:2

I still don't get it . Are we multiplying both of the numbers in White to get the 10?

Re: In a certain neighborhood there are half as many beige house [#permalink]

Show Tags

28 Feb 2013, 17:54

dananyc wrote:

I still don't get it . Are we multiplying both of the numbers in White to get the 10?

Karishma , just added a kudos for your reply.

As karishma stated : "there are half as many beige houses as white houses" - implies Beige:White = 1:2 (There are fewer Beige houses) "there are five times as many white houses as brown houses" - implies White:Brown = 5:1 (There are more White houses)

Hence, Beige:White:Brown = 5:10:2

She made the ratios common above Be : Wi = 1:2 (same as 5:10) Wi : br = 5:1 (same as 10:2)

Once the white ratio is made common in above 2 equations then we can merge the 2 as Be: wi : Br = 5:10:2

Re: In a certain neighborhood there are half as many beige house [#permalink]

Show Tags

28 Feb 2013, 19:01

It is not difficult to concentrate on the stem and think: white is \(20\), brown is \(\frac{1}{5}\) of white so \(4\) and beige is \(half\) of white so \(10\)

\(Brown / beige\) \(=\)\(\frac{4}{10}\) \(=\) \(\frac{2}{5}\) C

30 seconds. that's it. no formula, no bother
_________________

I still don't get it . Are we multiplying both of the numbers in White to get the 10?

Karishma , just added a kudos for your reply.

As karishma stated : "there are half as many beige houses as white houses" - implies Beige:White = 1:2 (There are fewer Beige houses) "there are five times as many white houses as brown houses" - implies White:Brown = 5:1 (There are more White houses)

Hence, Beige:White:Brown = 5:10:2

She made the ratios common above Be : Wi = 1:2 (same as 5:10) Wi : br = 5:1 (same as 10:2)

Once the white ratio is made common in above 2 equations then we can merge the 2 as Be: wi : Br = 5:10:2

Another way to look at

Be/Wi = 1/2 ( Wi = 2 Be) Wi/Br = 5/1 ( Wi = 5 Br)

so we 2 Be = 5 Br , Br/ Be = 2/5.

I hope I made some sense.

To add to what hikaps14 said, ratio between two numbers is nothing but the relation between them.

Beige:White = 1:2 means for every one Beige, there are two Whites

White: Brown = 5:1 means for every 5 Whites, there is 1 Brown.

So what is the relation between Beige and Brown? We don't know because the numbers of whites are not comparable. So what do we do? We make the Whites comparable i.e. we make them same.

Beige:White = 1:2 = 5:10 (ratio remains the same if you multiply each term by the same number) means for every 5 Beige, there are 10 Whites. White: Brown = 5:1 = 10:2 means for every 10 WHites, there are 2 Browns.

Now we can say that for every 5 Beige, there are 10 Whites and for every 10 Whites, there are 2 Browns. SO for every 5 Beige, there are 2 Browns.

Beige:Brown = 5:2

This is how you manipulate ratios. It is useful to know.

This question is best solved taking numbers though (as done by Ian above)
_________________

Re: In a certain neighborhood there are half as many beige house [#permalink]

Show Tags

06 May 2016, 04:28

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.
_________________

Re: In a certain neighborhood there are half as many beige house [#permalink]

Show Tags

06 May 2016, 10:49

[quote="megafan"]In a certain neighborhood there are half as many beige houses as white houses and five times as many white houses as brown houses. What is the ratio of the number of brown houses to the number of beige houses?

(A) 1:10

(B) 1:9

(C) 2:5

(D) 5:2

(E) 10:1

take Brown houses=100 then white houses =500 beige houses =250

ratio of brown houses/beige houses=100/250= 2:5 answer C

gmatclubot

Re: In a certain neighborhood there are half as many beige house
[#permalink]
06 May 2016, 10:49

Its been long time coming. I have always been passionate about poetry. It’s my way of expressing my feelings and emotions. And i feel a person can convey...

Written by Scottish historian Niall Ferguson , the book is subtitled “A Financial History of the World”. There is also a long documentary of the same name that the...

Post-MBA I became very intrigued by how senior leaders navigated their career progression. It was also at this time that I realized I learned nothing about this during my...