GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 21 Oct 2018, 17:26

### GMAT Club Daily Prep

#### 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

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

# What is the sum of the terms in a certain sequence of consecutive in a

Author Message
TAGS:

### Hide Tags

Retired Moderator
Joined: 29 Apr 2015
Posts: 848
Location: Switzerland
Concentration: Economics, Finance
Schools: LBS MIF '19
WE: Asset Management (Investment Banking)
What is the sum of the terms in a certain sequence of consecutive in a  [#permalink]

### Show Tags

25 Jun 2015, 12:07
7
00:00

Difficulty:

35% (medium)

Question Stats:

73% (01:22) correct 27% (01:13) wrong based on 217 sessions

### HideShow timer Statistics

What is the sum of the terms in a certain sequence of consecutive integers?

(1) The least term in the sequence is 8.

(2) The average of (arithmetic mean) terms is 16.

_________________

Saving was yesterday, heat up the gmatclub.forum's sentiment by spending KUDOS!

PS Please send me PM if I do not respond to your question within 24 hours.

CEO
Joined: 08 Jul 2010
Posts: 2564
Location: India
GMAT: INSIGHT
WE: Education (Education)
What is the sum of the terms in a certain sequence of consecutive in a  [#permalink]

### Show Tags

26 Jun 2015, 05:21
reto wrote:
What is the sum of the terms in a certain sequence of consecutive integers?

(1) The least term in the sequence is 8.

(2) The average of (arithmetic mean) terms is 16.

CONCEPT: To answer this question we need to know any term of the sequence with it's place no. in Sequence and the Number of terms in the sequence

Statement 1: The least term in the sequence is 8.

The least term doesn't tell us about how many terms the sequence has so
NOT SUFFICIENT

Statement 2: The average of (arithmetic mean) terms is 16

Average of the sequence of Consecutive terms = Median of the sequence = Average of Least and Highest term
But The Average of the terms doesn't tell us about how many terms the sequence has so
NOT SUFFICIENT

Combining the two statements

Average of the sequence of Consecutive terms = Median of the sequence = Average of Least and Highest term = (8+ Highest terms)/2 = 16

i.e. Highest term of the Sequence = 32-8 = 24
i.e. The series includes all Integers from 8 to 24 i.e. a total of 17 terms
Now the Sum of the series can be calculated = 16*17 = 272

SUFFICIENT

_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Manager
Joined: 17 Jun 2015
Posts: 220
GMAT 1: 540 Q39 V26
GMAT 2: 680 Q46 V37
Re: What is the sum of the terms in a certain sequence of consecutive in a  [#permalink]

### Show Tags

24 Dec 2015, 07:38
TO find the sum we need to following

No. of terms and Any one term
Common difference

Since this is a sequence of consecutive integers, the common difference is 1. However, we don't know how many terms or the first term.

Statement 1: The first terms is 8 The last term? 998647? 12? 156?
No clue. Insufficient

Statement 2: Gives the average
In an AP the median and the mean are same. So, if we know the middle term and the number of terms or the first term it is sufficient to make the needed calculations
This statement gives the average.
Could the sequence be 15, 16, 17?
Or could it be 14, 15, 16, 17, 18?
The sum varies.
Insufficient

Botht the statements together give the first term as well as the average, which happens to be the median in a set of consecutive integers. Hence, C
_________________

Fais de ta vie un rêve et d'un rêve une réalité

Non-Human User
Joined: 09 Sep 2013
Posts: 8507
Re: What is the sum of the terms in a certain sequence of consecutive in a  [#permalink]

### Show Tags

09 May 2017, 08:42
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: What is the sum of the terms in a certain sequence of consecutive in a &nbs [#permalink] 09 May 2017, 08:42
Display posts from previous: Sort by