NEW HERE? LEARN MORE
closeclose
Last visit was: 26 Apr 2024, 10:04 It is currently 26 Apr 2024, 10:04
Decision Tracker
My Rewards
New posts
New comers' posts

Close
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
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

If T is a list of consecutive integers in increasing order

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
vikrantgulia
Manager
Manager
Joined: 18 Oct 2013
Posts: 62
Own Kudos [?]: 266 [25]
Given Kudos: 36
Location: India
Concentration: Technology, Finance
Schools: Duke '16 Schulich '15 Neeley '15 Erasmus '16 HKUST '16 Johnson '16 HSG '15 Marshall '16 Kelley '16 Insead '14 McDonough '16 Tepper '16 IE April'15
GMAT 1: 580 Q48 V21
GMAT 2: 530 Q49 V13
GMAT 3: 590 Q49 V21
WE:Information Technology (Computer Software)
Send PM
If T is a list of consecutive integers in increasing order [#permalink] New post   Updated on: 09 Jul 2014, 03:01
1
Kudos
23
Bookmarks
00:00
A
B
C
D
E

Difficulty:

15% (low)

Question Stats:

78% (01:19) correct 22% (01:18) wrong based on 585 sessions
Hide Show timer Statistics
If T is a list of consecutive integers in increasing order, what is the sum of integers in T?

(1) The difference between the last integer in T and the first integer in T is 100.
(2) The fourth integer in T is -6
ShowHide Answer
Official Answer
C

Originally posted by vikrantgulia on 09 Jul 2014, 02:45.
Last edited by Bunuel on 09 Jul 2014, 03:01, edited 1 time in total.
Edited the question.
Most Helpful Reply
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92945
Own Kudos [?]: 619199 [7]
Given Kudos: 81609
Send PM
CAT Tests Forum Quiz Mode
Re: If T is a list of consecutive integers in increasing order [#permalink] New post   09 Jul 2014, 03:08
4
Kudos
3
Bookmarks
Expert Reply
If T is a list of consecutive integers in increasing order, what is the sum of integers in T?

(1) The difference between the last integer in T and the first integer in T is 100. This implies that there are 101 integers in the list. T could be any list of 101 consecutive integers. For example, {0, 1, 2, ..., 100} or {1, 2, 3, ..., 101}. Not sufficient.

(2) The fourth integer in T is -6. This implies that the first integer is -9. We don't know how many integers are there in the list, hence cannot get the sum. Not sufficient.

(1)+(2) We know that the first integer is -9 and that there are total of 101 integers in the list: T = {-9, -8, -7, -6, ..., 91}. We can get the sum. Sufficient.

Answer: C.

Hope it's clear.
General Discussion
User avatar
vikrantgulia
Manager
Manager
Joined: 18 Oct 2013
Posts: 62
Own Kudos [?]: 266 [0]
Given Kudos: 36
Location: India
Concentration: Technology, Finance
Schools: Duke '16 Schulich '15 Neeley '15 Erasmus '16 HKUST '16 Johnson '16 HSG '15 Marshall '16 Kelley '16 Insead '14 McDonough '16 Tepper '16 IE April'15
GMAT 1: 580 Q48 V21
GMAT 2: 530 Q49 V13
GMAT 3: 590 Q49 V21
WE:Information Technology (Computer Software)
Send PM
Re: If T is a list of consecutive integers in increasing order [#permalink] New post   09 Jul 2014, 02:53
1) The difference between any two integer is 100.So,Let first number could be -1,0,or,1 then last number would be 99,100,or 101 and each series give different sum. Hence, Not Sufficient.

2) fourth integer is -6 .so first integer is n+3=-6 i.e -9 but we don't know the number of of terms in T. that sum of 100 terms of sum of 200 terms. Not sufficient

1) and 2) together we know that first integer is -9 and difference of last integer and first integer is 100. So we definitely get a sum.Hence C is the correct answer
avatar
australia123
Intern
Intern
Joined: 07 Jul 2014
Posts: 10
Own Kudos [?]: 7 [1]
Given Kudos: 0
Send PM
Re: If T is a list of consecutive integers in increasing order [#permalink] New post   10 Jul 2014, 00:57
1
Kudos
Banuel you gave the solution on all thread, so a lot of thanks of you...
User avatar
S
GloryBoy92
Intern
Intern
Joined: 13 Apr 2018
Posts: 30
Own Kudos [?]: 26 [0]
Given Kudos: 69
Location: Zambia
Concentration: Finance, Real Estate
GPA: 2.98
WE:Analyst (Investment Banking)
Send PM
Re: If T is a list of consecutive integers in increasing order [#permalink] New post   22 May 2019, 10:27
Bunuel wrote:
If T is a list of consecutive integers in increasing order, what is the sum of integers in T?

(1) The difference between the last integer in T and the first integer in T is 100. This implies that there are 101 integers in the list. T could be any list of 101 consecutive integers. For example, {0, 1, 2, ..., 100} or {1, 2, 3, ..., 101}. Not sufficient.

(2) The fourth integer in T is -6. This implies that the first integer is -9. We don't know how many integers are there in the list, hence cannot get the sum. Not sufficient.

(1)+(2) We know that the first integer is -9 and that there are total of 101 integers in the list: T = {-9, -8, -7, -6, ..., 91}. We can get the sum. Sufficient.

Answer: C.

Hope it's clear.


Hi Burnel, why is the first integer -9?
User avatar
G
Inten21
Manager
Manager
Joined: 18 Jan 2017
Posts: 123
Own Kudos [?]: 98 [0]
Given Kudos: 155
Send PM
Re: If T is a list of consecutive integers in increasing order [#permalink] New post   05 Sep 2019, 09:48
GloryBoy92 wrote:
Bunuel wrote:
If T is a list of consecutive integers in increasing order, what is the sum of integers in T?

(1) The difference between the last integer in T and the first integer in T is 100. This implies that there are 101 integers in the list. T could be any list of 101 consecutive integers. For example, {0, 1, 2, ..., 100} or {1, 2, 3, ..., 101}. Not sufficient.

(2) The fourth integer in T is -6. This implies that the first integer is -9. We don't know how many integers are there in the list, hence cannot get the sum. Not sufficient.

(1)+(2) We know that the first integer is -9 and that there are total of 101 integers in the list: T = {-9, -8, -7, -6, ..., 91}. We can get the sum. Sufficient.

Answer: C.

Hope it's clear.


Hi Burnel, why is the first integer -9?



Mind if I answer it for you!

So the statement says that "The fourth integer in T is -6."
Trace it back to get the first integer in the series. -9 <1st> // -8 <2nd> // -7 <3rd> // and then -6 <4th, which is given>


Hope it is clear now. :-)
User avatar
G
Basshead
Director
Director
Joined: 09 Jan 2020
Posts: 966
Own Kudos [?]: 223 [0]
Given Kudos: 434
Location: United States
Send PM
Re: If T is a list of consecutive integers in increasing order [#permalink] New post   23 Nov 2020, 10:01
vikrantgulia wrote:
If T is a list of consecutive integers in increasing order, what is the sum of integers in T?

(1) The difference between the last integer in T and the first integer in T is 100.
(2) The fourth integer in T is -6



To determine the sum of integers in T, we need to do the number of integers and either the first integer or the last integer in the set.

(1) This gives us the number of integers, but we don't know the first integer or last integer in the set. INSUFFICIENT.

(2) Given the fourth integer, we can determine the first integer. However, we don't know the number of integers in the set. INSUFFICIENT.

(1&2) Combined, we can determine the sum. SUFFICIENT.

Answer is C.
User avatar
bumpbot
Non-Human User
Joined: 09 Sep 2013
Posts: 32688
Own Kudos [?]: 822 [0]
Given Kudos: 0
Send PM
Re: If T is a list of consecutive integers in increasing order [#permalink] New post   24 Jun 2023, 06:28
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.
GMAT Club Bot
gmatclubot
Re: If T is a list of consecutive integers in increasing order [#permalink]
24 Jun 2023, 06:28
Moderator:
Bunuel
Math Expert
92945 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions