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 farm, the ratio of pigs to chickens is 13 to 28. When [#permalink]
28 Oct 2012, 22:01
1
This post was BOOKMARKED
00:00
A
B
C
D
E
Difficulty:
(N/A)
Question Stats:
95% (02:10) correct
5% (00:55) wrong based on 36 sessions
In a farm, the ratio of pigs to chickens is 13 to 28. When 15 pigs were added to the farm, the ratio of pigs to chickens became 4 to 7. What was the original total number of pigs and chickens in the farm?
I suppose that, [13][/28] + 15 pigs can be [16][/28] to reduce the fraction we probably will receive [4][/7], so 3 in numrator is equal - 15 pigs the total number of pigs before new comers = 13*5=75
how can I get the number of chickens?
Thanx
Last edited by actleader on 29 Oct 2012, 21:54, edited 2 times in total.
Re: Arithmetic In a farm, the ratio of pigs to chickens is 13 to [#permalink]
28 Oct 2012, 22:11
4
This post received KUDOS
Expert's post
actleader wrote:
Hi! Could you help me with tne next problem solving question.
In a farm, the ratio of pigs to chickens is 13 to 28. When 15 pigs were added to the farm, the ratio of pigs to chickens became 4 to 7. What was the original total number of pigs and chickens in the farm?
I suppose that, [13][/28] + 15 pigs can be [16][/28] to reduce the fraction we probably will receive [4][/7], so 3 in numrator is equal - 15 pigs the total number of pigs before new comers = 13*5=75
how can I get the number of chickens?
Thanx
Pigs:Chicken = 13:28 No of pigs = 13x, No of chicken = 28x
When 15 more pigs were added, ratio becomes 4:7 i.e.
\(\frac{(13x+15)}{28x} = \frac{4}{7}\) x = 5
Initially, the no of pigs was 13x = 13*5 = 65 No of chicken was 28x = 28*5 = 140 Original total = 205
or Original total = 13x + 28x = 41x = 41*5 = 205 _________________
Re: In a farm, the ratio of pigs to chickens is 13 to 28. When [#permalink]
29 Oct 2012, 00:29
1
This post received KUDOS
Expert's post
actleader wrote:
In a farm, the ratio of pigs to chickens is 13 to 28. When 15 pigs were added to the farm, the ratio of pigs to chickens became 4 to 7. What was the original total number of pigs and chickens in the farm?
I suppose that, [13][/28] + 15 pigs can be [16][/28] to reduce the fraction we probably will receive [4][/7], so 3 in numrator is equal - 15 pigs the total number of pigs before new comers = 13*5=75
Re: In a farm, the ratio of pigs to chickens is 13 to 28. When [#permalink]
03 Nov 2012, 08:13
Bunuel wrote:
actleader wrote:
In a farm, the ratio of pigs to chickens is 13 to 28. When 15 pigs were added to the farm, the ratio of pigs to chickens became 4 to 7. What was the original total number of pigs and chickens in the farm?
I suppose that, [13][/28] + 15 pigs can be [16][/28] to reduce the fraction we probably will receive [4][/7], so 3 in numerator is equal - 15 pigs the total number of pigs before new comers = 13*5=75
VeritasPrepKarishma, Bunuel thanx for solving the problem but I'd like yo know how can I found the number of chickens when I deducted that 3 in numerator is equal - 15 pigs?
Re: In a farm, the ratio of pigs to chickens is 13 to 28. When [#permalink]
03 Nov 2012, 20:53
Expert's post
actleader wrote:
VeritasPrepKarishma, Bunuel thanx for solving the problem but I'd like yo know how can I found the number of chickens when I deducted that 3 in numerator is equal - 15 pigs?
Yes, when you say that the the additional 3 is actually 15, you get 5 as the multiplier.
In your solution above, you wrote: "the total number of pigs before new comers = 13*5=75" which should actually be "the total number of pigs before new comers = 13*5=65" (calculation error)
Next, no of chickens will be 28*5 = 140 (after all, you have already found that the multiplier of the ratio is 5. You multiplied 13 by 5 to get the number of pigs. You multiply 28 by 5 to get the number of chickens) _________________
Re: In a farm, the ratio of pigs to chickens is 13 to 28. When [#permalink]
03 Nov 2012, 21:48
1
This post received KUDOS
actleader wrote:
In a farm, the ratio of pigs to chickens is 13 to 28. When 15 pigs were added to the farm, the ratio of pigs to chickens became 4 to 7. What was the original total number of pigs and chickens in the farm?
I suppose that, [13][/28] + 15 pigs can be [16][/28] to reduce the fraction we probably will receive [4][/7], so 3 in numrator is equal - 15 pigs the total number of pigs before new comers = 13*5=75
how can I get the number of chickens?
Thanx
15sec approach to solve this question: Original ratio is 13:28, which shows the original total must be a multiple of 41. Only 205 among answer choices is multiple of 41. Ans B it is.
Further, since you are interested in finding number of chickens too..Once you've total number, you can deduce number of chickens, pigs and everything else since you've the ratio given. _________________
Re: In a farm, the ratio of pigs to chickens is 13 to 28. When [#permalink]
30 Jan 2014, 10:58
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. _________________
As I’m halfway through my second year now, graduation is now rapidly approaching. I’ve neglected this blog in the last year, mainly because I felt I didn’...
Hilary Term has only started and we can feel the heat already. The two weeks have been packed with activities and submissions, giving a peek into what will follow...
Ninety-five percent of the Full-Time Class of 2015 received an offer by three months post-graduation, as reported today by Kellogg’s Career Management Center(CMC). Kellogg also saw an increase...