Hello everyone and welcome to the GMAT Club's Question Discussion Group Post all GMAT Questions Questions such as Quant, Verbal, or DI here. For strategy, debriefs, and study buddy, visit those specific groups. Thank you! Looking for the chatgroup instead? Join the chat group here

Data Sufficiency Butler: January 2024 January 12 DS 1 DS 2

Last visit was: 25 Apr 2026, 15:45

It is currently 25 Apr 2026, 15:45

Toolkit

General GMAT Questions and Strategies

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

Request Expert Reply

Confirm Cancel

Apr 26
Score High on the GMAT with Target Test Prep
10:00 AM EDT
-
11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 27
Try OnDemand GMAT Masterclass
11:00 AM EDT
-
12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 28
Join - GMAT Day!
08:00 AM PDT
-
11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.

Back to Forum

Create Topic

Practice Questions Chat

1 ... 150 151 152 153 154 ... 678

Subhro8831

Joined: 17 Aug 2023

Last visit: 19 Nov 2025

Posts: 5

Given Kudos: 3

Location: India

Posts: 5

Kudos: 0

11 Jan 2024, 07:22

Kudos

Bookmarks

A)12
Total - always together
5!/2! - 4!/2!

Bunuel

Math Expert

Joined: 02 Sep 2009

Last visit: 25 Apr 2026

Posts: 109,830

Own Kudos:

811,275

Given Kudos: 105,886

Products:

Expert

Expert reply

Posts: 109,830

Kudos: 811,275

11 Jan 2024, 07:33

Kudos

Bookmarks

animesh888

The letters D, G, I, I , and T can be used to form 5-letter strings as DIGIT or DGIIT.
Using these letters, how many 5-letter strings can be formed in which the two
occurrences of the letter I are separated by at least one other letter?
A) 12
B) 18
C) 24
D) 36
E) 48

This question is discussed in great detail here: https://gmatclub.com/forum/the-letters- ... 20320.html Hope it helps.

Malar95

Joined: 29 Oct 2023

Last visit: 13 Jun 2024

Posts: 328

Own Kudos:

168

Given Kudos: 11

Location: Malaysia

Posts: 328

Kudos: 168

11 Jan 2024, 07:34

Kudos

Bookmarks

poojaarora1818

Sure! I agree that we all are like a team and ready to help each other as we all are on the same boat. So, it would be a great lesson for all of us to learn something new from each other’s mistakes. It has also been important for all of us to have a growth mindset. This GMAT journey is not a alone journey without everyone’s support we cannot sail through the storm.

I’ll be honest. And to the moderators dw , this will be my last personal msg in this group.
But if it wasn’t for GMAT Club, I would have quit this long back. Its been a frustratingly lonely journey for me as a Malaysian. Which is why I am very active hsre. It motivates me through my burn out/self doubt phase.

Bunuel

Math Expert

Joined: 02 Sep 2009

Last visit: 25 Apr 2026

Posts: 109,830

Own Kudos:

811,275

Given Kudos: 105,886

Products:

Expert

Expert reply

Posts: 109,830

Kudos: 811,275

11 Jan 2024, 07:43

Kudos

Bookmarks

Please restrict the discussion to quantitative topics only. Any non-quantitative posts will be removed. Thank you!

poojaarora1818

Joined: 30 Jul 2019

Last visit: 25 Apr 2026

Posts: 1,624

Own Kudos:

784

Given Kudos: 3,820

Location: India

Concentration: General Management, Economics

Schools: Duke '27 Haas '27 Kelley '27 Kellogg '27 McDonough '27

GPA: 3

WE:Human Resources (Real Estate)

Products:

Schools: Duke '27 Haas '27 Kelley '27 Kellogg '27 McDonough '27

Posts: 1,624

Kudos: 784

11 Jan 2024, 07:45

Kudos

Bookmarks

Bunuel

Please restrict the discussion to quantitative topics only. Any non-quantitative posts will be removed. Thank you!

Sure. Pls accept my apologies. Next time it won’t be repeated.

SamzayWarrior

Joined: 07 Jun 2022

Last visit: 12 Jan 2025

Posts: 15

Own Kudos:

Given Kudos: 70

Location: India

Posts: 15

Kudos: 10

11 Jan 2024, 08:22

Kudos

Bookmarks

can anyone tell me how to avoid C trap in questions like these- in-a-rectangular-coordinate-system-what-are-the-coordinates-of-point-414310.html#p3334202

added a reply there only but thought of asking you guys for faster response

Sathvik02

Joined: 25 Nov 2022

Last visit: 09 Oct 2025

Posts: 202

Own Kudos:

117

Given Kudos: 41

Location: India

Concentration: Entrepreneurship, General Management

GMAT 1: 660 Q47 V34 Verified score

GMAT 2: 640 Q48 V29 Verified score

GPA: 4

WE:General Management (Manufacturing)

GMAT 2: 640 Q48 V29 Verified score

Posts: 202

Kudos: 117

11 Jan 2024, 10:05

Kudos

Bookmarks

SamzayWarrior

can anyone tell me how to avoid C trap in questions like these- in-a-rectang ... l#p3334202

This is what you have written and asked in doubt column. "once I got the value of x- I presumed we can get the value of y ": This is probably the biggest mistake in GMAT- To assume something, which is not given. Never ever assume anything in GMAT unless it’s given. Keep the emotions aside and let simple math win you a good GMAT score

Note: These types of questions are not answered here. You have to learn it yourself.

Nullbyte

Joined: 06 Oct 2023

Last visit: 21 Jul 2025

Posts: 363

Own Kudos:

137

Given Kudos: 57

Posts: 363

Kudos: 137

11 Jan 2024, 10:36

Kudos

Bookmarks

SamzayWarrior

can anyone tell me how to avoid C trap in questions like these- in-a-rectang ... l#p3334202

I think the variables which can take both positive and negative values of x and y need to be always checked for both values.
But values for things which can’t take a negative value. Like number of objects or time taken you can avoid. But even then with a quadratic equation there are cases where both values are positive in which case E(you can’t find a definite answer) would be the answer and both values are positive but due to some constraint one of them can’t exist, you can find a definite answer

Bunuel

Math Expert

Joined: 02 Sep 2009

Last visit: 25 Apr 2026

Posts: 109,830

Own Kudos:

811,275

Given Kudos: 105,886

Products:

Expert

Expert reply

Posts: 109,830

Kudos: 811,275

11 Jan 2024, 11:33

Kudos

Bookmarks

SamzayWarrior

can anyone tell me how to avoid C trap in questions like these- https://gmatclub.com/forum/in-a-rectang ... l#p3334202

added a reply there only but thought of asking you guys for faster response

I also find quick sketches very useful:

With statement (1), point C can be anywhere on the green circle, and with statement (2), it can be anywhere on the purple circle. These circles intersect at two points, indicating that point C could be located at either of them. These possible locations are marked in orange on the image above.

Bunuel

Math Expert

Joined: 02 Sep 2009

Last visit: 25 Apr 2026

Posts: 109,830

Own Kudos:

811,275

Given Kudos: 105,886

Products:

Expert

Expert reply

Posts: 109,830

Kudos: 811,275

12 Jan 2024, 02:41

Kudos

Bookmarks

Data Sufficiency Butler: January 2024
January 12	DS 1	DS 2

Bunuel

Math Expert

Joined: 02 Sep 2009

Last visit: 25 Apr 2026

Posts: 109,830

Own Kudos:

811,275

Given Kudos: 105,886

Products:

Expert

Expert reply

Posts: 109,830

Kudos: 811,275

12 Jan 2024, 02:42

Kudos

Bookmarks

Problem Solving Butler: January 2023
January 12	PS 1	PS 2

Yashvashisht17

Joined: 05 Jun 2023

Last visit: 08 May 2024

Posts: 16

Own Kudos:

Given Kudos: 53

Posts: 16

Kudos: 2

12 Jan 2024, 15:58

Kudos

Bookmarks

I consistently perform well in the quantitative section with scores ranging from 50 to 51. However, I face significant challenges in the verbal section during exams. Despite having strong verbal skills that should enable me to score 32 or above, I find myself struggling to concentrate on the questions. During the exam, I tend to just read the questions without thoroughly analyzing them. I often get distracted, thinking about unrelated things, and end up with scores in the range of 20 to 25. My upcoming exam is just a week away, and I urgently need assistance to overcome these issues and improve my performance in the verbal section. Can someone please provide guidance or tips?

Please help someone

Manasaggarwal

Joined: 01 Nov 2023

Last visit: 03 Nov 2024

Posts: 2

Kudos: 0

12 Jan 2024, 16:06

Kudos

Bookmarks

Yashvashisht17

1. SC modifiers
2. SC parallelism
3. CR boldface - teaches you the diff between argument, concl, assumption and premises
4. CR types of flaws

The 4 topics above cover 80% of your score

Watch any YouTube video for these. Roughly an hour each I guess

Yashvashisht17

Joined: 05 Jun 2023

Last visit: 08 May 2024

Posts: 16

Own Kudos:

Given Kudos: 53

Posts: 16

Kudos: 2

12 Jan 2024, 16:07

Kudos

Bookmarks

Manasaggarwal

1. SC modifiers 2. SC parallelism 3. CR boldface - teaches you the diff between argument, concl, assumption and premises 4. CR types of flaws The 4 topics above cover 80% of your score

every thing is clear even when i solve question sapratly I can solve them easily

Manasaggarwal

Watch any YouTube video for these. Roughly an hour each I guess

any LINK ?

Manasaggarwal

Joined: 01 Nov 2023

Last visit: 03 Nov 2024

Posts: 2

Kudos: 0

12 Jan 2024, 16:08

Kudos

Bookmarks

Yashvashisht17

any LINK ?

any works

Yashvashisht17

every thing is clear even when i solve question sapratly I can solve them easily

They teach you the diff between options sounding right in your head vs logically eliminating every option. Even if you get distracted, you can always rely on the latter

Ntaafuonua

Joined: 09 Sep 2023

Last visit: 03 May 2024

Posts: 8

Own Kudos:

Given Kudos: 6

Posts: 8

Kudos: 6

12 Jan 2024, 19:42

Kudos

Bookmarks

Hello guys can you help me with this DS question

What is SD of given set of numbers whose average is 5?
1. None of the numbers are greater than this Average
2. The Standard deviation is 5 when value of each of the given number is increased by 7
will be grateful if you can provide examples.
to me B is the correct options.
but i seem not to understand the statement 1

GMAT695

Joined: 12 Jul 2023

Last visit: 19 Dec 2025

Posts: 544

Own Kudos:

719

Given Kudos: 243

Location: India

Concentration: Entrepreneurship, Finance

Schools: Stern '27 Fuqua '27 Columbia '27

GMAT Focus 1: 535 Q77 V78 DI74 Verified score

GMAT Focus 2: 575 Q83 V74 DI78 Verified score

GMAT Focus 3: 635 Q87 V81 DI76 Verified score

GMAT 1: 420 Q31 V17 Verified score

GPA: 7.37

WE:Business Development (Finance)

Schools: Stern '27 Fuqua '27 Columbia '27

GMAT Focus 3: 635 Q87 V81 DI76 Verified score

GMAT 1: 420 Q31 V17 Verified score

Posts: 544

Kudos: 719

12 Jan 2024, 19:57

Kudos

Bookmarks

Ntaafuonua

What is SD of given set of numbers whose average is 5? 1. None of the numbers are greater than this Average 2. The Standard deviation is 5 when value of each of the given number is increased by 7 will be grateful if you can provide examples. to me B is the correct options. but i seem not to understand the statement 1

In S1, it says all the numbers in set are less than or equal to 5..In this case, SD=0 because each number is exactly at the average or below, so there’s no variation.

Nullbyte

Joined: 06 Oct 2023

Last visit: 21 Jul 2025

Posts: 363

Own Kudos:

137

Given Kudos: 57

Posts: 363

Kudos: 137

12 Jan 2024, 20:09

Kudos

Bookmarks

Ntaafuonua

If the avg is 5 and none of the numbers is more than 5 then all the numbers have to be 5 because if any number is less than 5(say 3 which is 2 less than 5) we need another number 7(which is 2 more than 5) to maintain the avg of 5

since we don’t have any number greater than 5, it means that all the numbers are exactly 5

Bunuel

Math Expert

Joined: 02 Sep 2009

Last visit: 25 Apr 2026

Posts: 109,830

Own Kudos:

811,275

[1]

Given Kudos: 105,886

Products:

Expert

Expert reply

Posts: 109,830

Kudos: 811,275

[1]

12 Jan 2024, 20:11

Kudos

Bookmarks

Ntaafuonua

You've copied the second statement incorrectly. Here is a correct version:

Standard deviation shows how much variation there is from the mean. A low standard deviation indicates that the data points tend to be very close to the mean, whereas a high standard deviation indicates that the data are spread out over a large range of values.

We need to know a couple of important properties for this question:

If we add or subtract a constant to each term in a set:

The mean will increase or decrease by the same constant.
The standard deviation (SD) will not change.

If we increase or decrease each term in a set by the same percentage (multiply all terms by the same constant):

The mean will increase or decrease by the same percentage.
The SD will increase or decrease by the same percentage.

You can try it yourself:
The SD of a set: {1,1,4} will be the same as that of {5,5,8}, as the second set is obtained by adding 4 to each term of the first set.

This is because the standard deviation shows how much variation there is from the mean. And when adding or subtracting a constant to each term, we are shifting the mean of the set by this constant (the mean will increase or decrease by the same constant), but the variation from the mean remains the same, as all terms are also shifted by the same constant.

Also: If the range or SD of a list is 0, then the list will contain all identical elements. Conversely, if a list contains all identical elements, then the range and SD of the list is 0. If the list contains 1 element: The range is zero and the SD is zero.

This is because if a list contains all identical elements, then there is no variation from the mean, hence SD=0.

BACK TO THE ORIGINAL QUESTION:

What is SD of given set of numbers whose average is 5?

(1) None of the numbers are greater than this Average

If no number is more than the mean, then no number is less than the mean, which implies that this list contains all identical elements (or, equivalently, just one element), so SD=0. Sufficient.

(2) The Standard deviation is 0 when value of each of the given number is increased by 7 -->

If we add or subtract a constant to each term in a set, the SD will not change, so SD=0. Sufficient.

Answer: D.

For more on Standard Deviation check:

https://gmatclub.com/forum/ps-questions ... 85897.html

https://gmatclub.com/forum/ds-questions ... 85896.html

Hope it helps.

P.S. The original question is discussed here: https://gmatclub.com/forum/what-is-sd-o ... 04000.html

Ntaafuonua

Joined: 09 Sep 2023

Last visit: 03 May 2024

Posts: 8

Own Kudos:

Given Kudos: 6

Posts: 8

Kudos: 6

12 Jan 2024, 20:25

Kudos

Bookmarks

Ntaafuonua

Thanks guys. I appreciate you.
@Bunuel. I read this earlier post by then i think i misinterpreted the statement 1 as;
example we could have a set {2,2,3,3,5} which has an average of 5 and a total of 15 which may have a different standard deviation from a set (5,5,5).
this got me confused.

1 ... 150 151 152 153 154 ... 678

Moderators:

gchandana

193 posts

MBAACCOUNT2025

General GMAT Forum Moderator

473 posts

Prep Toolkit

Announcements

GMAT Inequalities - The Concepts You Must Know

Subscribe to GMAT Club for New Videos on GMAT Strategies, Expert Sessions, and Debriefs

How to Build your Target MBA Business Schools List?

Subscribe to MBA Club for New Videos on Essays, School-specific Strategies, & Insights Every Applicant Needs

Get Free GMAT Tests by Registering for GMAT Day!

AGSM at UNIVERSITY OF CALIFORNIA RIVERSIDE

Top GMAT Focus Debriefs

An Emory MBA Powers Growth

Emory powers growth—professionally and personally. Built on a foundation of interdisciplinary learning, leadership development, and career readiness, our top-20 MBA program delivers a high return on investment with top-5 career outcomes.

Tuck at Dartmouth

Step Inside the Tuck Experience: Discover Tuck Events This Fall
Current Tuck MBA students and Discover Tuck co-chairs share advice for prospective students and reflect on why they chose Tuck for their MBA.

Read More

My Rewards

What are Rewards?

My Tier

(1 points)

HOT DEALS FOR APRIL

	Manhattan Prep: $99 Bonus Score Higher on Your GMAT Exam. Guaranteed.
	Target Test Prep - Save up to $599 $400 Discount + $99 Bonus GMAT Club Tests
	e-GMAT: 60% Off on GMAT Focus Get to 735+ from any starting point
	Magoosh increases your score, guaranteed - 15% off ALL Magoosh GMAT plans with code GMATCLUB15 + Free GMAT Club Tests.
	Experts' Global - ~~$1720~~ $960 End-to-End GMAT Prep + App Support: 150+ Videos, 2000+ Questions, 15 FLTs +
	GMATWhiz - $299 ~~$499~~ Experience the course through a free trial.
	GMAT Club Tests - Free Included with every course purchase of $149+ View all deals

Practice Questions Chat

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards