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 350,000 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 zoo, the ratio of the number of cheetahs to the number [#permalink]
07 Jul 2012, 21:52

1

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

5% (low)

Question Stats:

88% (01:51) correct
12% (01:05) wrong based on 73 sessions

In a zoo, the ratio of the number of cheetahs to the number of pandas is 1 : 3 and was the same five years ago. If the increase in the number of cheetahs in the zoo since then is 5, then what is the increase in the number of pandas?

In a zoo, the ratio of the number of cheetahs to the number of pandas is 1 : 3 and was the same five years ago. If the increase in the number of cheetahs in the zoo since then is 5, then what is the increase in the number of pandas? A) 2 (B) 3 (C) 5 (D) 10 (E) 15

Hi,

Ratio of cheetah to panda = 1:3 or \(\frac {x}{3x}\) so, if number of cheetah increases by 5 such that the ratio must remain same, then \(\frac {x+5x}{3(x+5x)} = \frac {x+5x}{3x+15x}\) so increase in the number of panda would be in multiple of 15.

Re: In a zoo, the ratio of the number of cheetahs to the number [#permalink]
27 Jul 2012, 03:02

Consider the number of cheetahs = 10;...> no of pandas=30 Therefore if number of cheetas is 5 more=10+5=15 then pandas must be 3 times more=15*3=45. Increase in the number of pandas=45-30=15

Ans-D _________________

I've failed over and over and over again in my life and that is why I succeed--Michael Jordan Kudos drives a person to better himself every single time. So Pls give it generously Wont give up till i hit a 700+

Re: In a zoo, the ratio of the number of cheetahs to the number [#permalink]
04 Mar 2015, 10:21

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 zoo, the ratio of the number of cheetahs to the number [#permalink]
04 Mar 2015, 16:43

Expert's post

Hi All,

When a ratio question involves "relatively small" numbers, you can quickly "brute force" the prompt and get to the correct answer.

Here, we know the ratio of cheetahs to pandas is 1:3. Since you can't have a "fraction" of an animal, that means that the number of cheetahs is a multiple of 1 and the number of pandas is the equivalent multiple of 3.

Here is a quick list of the immediate possibilities....

C:P 1:3 1 and 3 2 and 6 3 and 9 4 and 12 5 and 15 6 and 18 Etc.

We're told that the ratio of cheetahs to pandas stayed the same and that over the last 5 years there was an increase of 5 cheetahs.

If we "start" with 1 cheetah and 3 pandas, then increase the number of cheetahs by 5.....we'll have 6 cheetahs and 18 pandas....Thus, the number of pandas increased from 3 to 18 (an increase of 15.

Re: In a zoo, the ratio of the number of cheetahs to the number [#permalink]
04 Mar 2015, 21:12

Expert's post

farukqmul wrote:

In a zoo, the ratio of the number of cheetahs to the number of pandas is 1 : 3 and was the same five years ago. If the increase in the number of cheetahs in the zoo since then is 5, then what is the increase in the number of pandas?

(A) 2 (B) 3 (C) 5 (D) 10 (E) 15

Use simple logic:

Given the ratio 1:3, if you increase 1 by 5, you will need to increase 3 by 3*5 to retain the ratio

Re: In a zoo, the ratio of the number of cheetahs to the number [#permalink]
05 Mar 2015, 07:03

One simple logic would be;If two things are in ratio then over the period of time if there is any increment/decrement and even after that they maintain same ratio then increment/decrement will also be in the same ratio.

Now and 5 years back ratio is= 1:3 Increment in C= 5 Hence, Increment in P will be 15

Hope this helps !

gmatclubot

Re: In a zoo, the ratio of the number of cheetahs to the number
[#permalink]
05 Mar 2015, 07:03

The Importance of Financial Regulation : Before immersing in the technical details of valuing stocks, bonds, derivatives and companies, I always told my students that the financial system is...

One question I get a lot from prospective students is what to do in the summer before the MBA program. Like a lot of folks from non traditional backgrounds...