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 sequences S has 240 terms, what is the 239th term of S?

(1) Each term of S after the first term is 4 less than the preceding term. We have an evenly spaced set (arithmetic progression) but we need to know any term to answer the question. Not sufficient.

(2) The 239th term of S is 952 less than the first term. Clearly insufficient.

(1)+(2) The second statement can be derived from the first, so we have no new info. Basically we only know that the sequence is an arithmetic progression with common difference of 4. Not sufficient.

Re: If sequences S has 240 terms, what is the 239th term of S? [#permalink]

Show Tags

12 Nov 2014, 03:35

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: If sequences S has 240 terms, what is the 239th term of S? [#permalink]

Show Tags

03 Jan 2015, 06:41

1

This post was BOOKMARKED

Hi Bunuel and all,

I know OA says E, I don't think I'm wrong either unless my understanding is...

thus consider/ please correct my understanding for this sentence. Because it seems to me that with arithmetic progression -consecutive progression and the term made known, then only can the answer be found.

My answer was C, because we know that is an arithmetic progression and the first and 239th term is 952. Therefore 1st, 2nd,....239th term => 952/238 = 4. Therefore 1st to 240th term is 1st term + the arithmetic progression difference = 4 + 956 = 960.

I know OA says E, I don't think I'm wrong either unless my understanding is...

thus consider/ please correct my understanding for this sentence. Because it seems to me that with arithmetic progression -consecutive progression and the term made known, then only can the answer be found.

My answer was C, because we know that is an arithmetic progression and the first and 239th term is 952. Therefore 1st, 2nd,....239th term => 952/238 = 4. Therefore 1st to 240th term is 1st term + the arithmetic progression difference = 4 + 956 = 960.

GKA

(2) says that the difference between 239th term and the first term is 952. This is true for ANY evenly spaced set with the common difference of 4.
_________________

Re: If sequences S has 240 terms, what is the 239th term of S? [#permalink]

Show Tags

11 Oct 2015, 07:38

1

This post received KUDOS

Bunuel wrote:

If sequences S has 240 terms, what is the 239th term of S?

(1) Each term of S after the first term is 4 less than the preceding term. We have an evenly spaced set (arithmetic progression) but we need to know any term to answer the question. Not sufficient.

(2) The 239th term of S is 952 less than the first term. Clearly insufficient.

(1)+(2) The second statement can be derived from the first, so we have no new info. Basically we only know that the sequence is an arithmetic progression with common difference of 4. Not sufficient.

Answer: E.

To get this right:

(1) Statement 1 says: \(A_N = A_{N-1}-4\). The question asks for \(A_{239}=?\). So all we needed to solve was one of the real values values such as \(A_{50}\) or any other?

If sequences S has 240 terms, what is the 239th term of S?

(1) Each term of S after the first term is 4 less than the preceding term. We have an evenly spaced set (arithmetic progression) but we need to know any term to answer the question. Not sufficient.

(2) The 239th term of S is 952 less than the first term. Clearly insufficient.

(1)+(2) The second statement can be derived from the first, so we have no new info. Basically we only know that the sequence is an arithmetic progression with common difference of 4. Not sufficient.

Answer: E.

To get this right:

(1) Statement 1 says: \(A_N = A_{N-1}-4\). The question asks for \(A_{239}=?\). So all we needed to solve was one of the real values values such as \(A_{50}\) or any other?

Re: If sequences S has 240 terms, what is the 239th term of S? [#permalink]

Show Tags

29 Oct 2015, 07:30

1

This post received KUDOS

Bunuel wrote:

If sequences S has 240 terms, what is the 239th term of S?

(1) Each term of S after the first term is 4 less than the preceding term. We have an evenly spaced set (arithmetic progression) but we need to know any term to answer the question. Not sufficient.

(2) The 239th term of S is 952 less than the first term. Clearly insufficient.

(1)+(2) The second statement can be derived from the first, so we have no new info. Basically we only know that the sequence is an arithmetic progression with common difference of 4. Not sufficient.

Answer: E.

Need your help in correcting my understanding.

1. Each term of S after the first term is 4 less than the preceding term 2. The 239th term of S is 952 less than the first term

If first term = a, second term = a-4, so common difference = -4 (from 1). tn = a + (n-1)d so we can write: a-952 = a + (239-1)d 1+2 a-952 = a + (239-1) (-4),we will find a and then we can find 239th term. Please help me understand where exactly I am unable to interpret the statements correctly.

WE: Business Development (Hospitality and Tourism)

If sequences S has 240 terms, what is the 239th term of S? [#permalink]

Show Tags

11 Jan 2016, 13:27

2

This post received KUDOS

1

This post was BOOKMARKED

gauraku wrote:

Bunuel wrote:

If sequences S has 240 terms, what is the 239th term of S?

(1) Each term of S after the first term is 4 less than the preceding term. We have an evenly spaced set (arithmetic progression) but we need to know any term to answer the question. Not sufficient.

(2) The 239th term of S is 952 less than the first term. Clearly insufficient.

(1)+(2) The second statement can be derived from the first, so we have no new info. Basically we only know that the sequence is an arithmetic progression with common difference of 4. Not sufficient.

Answer: E.

Need your help in correcting my understanding.

1. Each term of S after the first term is 4 less than the preceding term 2. The 239th term of S is 952 less than the first term

If first term = a, second term = a-4, so common difference = -4 (from 1). tn = a + (n-1)d so we can write: a-952 = a + (239-1)d 1+2 a-952 = a + (239-1) (-4),we will find a and then we can find 239th term. Please help me understand where exactly I am unable to interpret the statements correctly.

Hi Gauraku- I had a similar idea at first but I believe you're overcomplicating. One of the key ideas I always try to keep in mind is: how is the GMAT trying to trick me? What does it want me to believe? In this case, the GMAT wants you to think exactly as you have. However, when you simplify your equation, a = 0. While this could be a value of the first term, the first term could also equal 1000 and the 239th term equal 8 OR the first term could equal 10000 and 239th term equal 9,048. All three of these pairs follow the rule of being 4 less than the preceding term.

The main idea is that when we divide 952 by 4, we get 238, meaning that the 238th term is -4*238 less than the 1st- this does not give any new information since we already know all terms are spaced 4 apart from statement 1.

Re: If sequences S has 240 terms, what is the 239th term of S? [#permalink]

Show Tags

11 Jun 2017, 00:35

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.
_________________

If sequences S has 240 terms, what is the 239th term of S?

1) Each term of S after the first term is 4 less than the preceding term 2) The 239th term of S is 952 less than the first term

IMPORTANT: Statement 2 can be directly inferredfrom statement 1. That is, if each term is 4 less than the previous term (e.g., 19, 15, 11, etc) then we can conclude that term2 will be 4 less than term1. We can also conclude that term3 will be 8 less than term1, and: term4 will be 12 less than term1. term5 will be 16 less than term1. . . . term239 will be 952 less than term1 (same as statement 2).

So, as you can see, statement 2 DOES NOT PROVIDE ANY EXTRA INFORMATION beyond the information that statement 1 provided.

So, if statement 1 is NOT SUFFICIENT (which is clearly the case), then statement 2 cannot be NOT SUFFICIENT. More importantly, the statements combined are NOT SUFFICIENT.

Re: If sequences S has 240 terms, what is the 239th term of S? [#permalink]

Show Tags

12 Sep 2017, 12:46

If sequences S has 240 terms, what is the 239th term of S?

1) Each term of S after the first term is 4 less than the preceding term 2) The 239th term of S is 952 less than the first term

When solving such type of questions always think what is required to get the value of 239 Term

If we know how the series is formed, or if we are given the certain relationship between terms, or are the terms of the seq repetitive or is some kind of pattern in these terms.

So stmt 1 : Gives us how the seq is formed.

It says ( Xn)= (Xn-1) -4. This means the seq is an AP.

So 239 term will be X239= (Xn-1)+ (239-1) (-4) so we are given X 239= X(n-1)-952. So we need to find the value of Xn-1 to get the value of X239

Stmt 2: This is what has been derived from STMT 1

So We cannot find the value if required term till we have at least value of Xn-1 or any other term of the seq.
_________________

Version 8.1 of the WordPress for Android app is now available, with some great enhancements to publishing: background media uploading. Adding images to a post or page? Now...

Post today is short and sweet for my MBA batchmates! We survived Foundations term, and tomorrow's the start of our Term 1! I'm sharing my pre-MBA notes...

“Keep your head down, and work hard. Don’t attract any attention. You should be grateful to be here.” Why do we keep quiet? Being an immigrant is a constant...