GMAT Data Sufficiency (DS) Forum - Free Practice Questions

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Complete 1000 GMAT Data Sufficiency Series (DS-1000 Series) Questions

Bunuel

25 Oct 2022, 08:11

176

15

78,579

by: thisisakr

16 Apr 2026, 11:46

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100 Hardest and easiest questions for DS as of March 2026

1, 2

Bunuel

01 Jan 2026, 05:45

854

24

188,435

by: bumpbot

16 Sep 2025, 06:05

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DS Question Directory by Topic and Difficulty

bb

29 Aug 2025, 13:27

1.5k

0

487,782

by: bb

29 Aug 2025, 13:27

ER

Set A = {a, b, c} and has a median of b. Is the average of a and c gre

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

Bunuel

10 Aug 2018, 03:43

4

9

4,992

by: bumpbot

28 Jul 2025, 11:09

ER

At a bakery, cakes are sold every day for a certain number of days. If

805+ (Hard) | Statistics and Sets Problems

805+ (Hard) | Statistics and Sets Problems hide tags

Bunuel

14 May 2017, 10:51

27

8

9,464

by: bumpbot

28 Jul 2025, 11:01

ER

If b = 3a, is the average (arithmetic mean) of the five terms in the

605-655 (Medium) | Inequalities, Statistics and Sets Problems

605-655 (Medium) | Inequalities, Statistics and Sets Problems hide tags

Bunuel

11 Feb 2022, 02:30

16

6

4,129

by: bumpbot

28 Jul 2025, 11:00

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The average of several test scores is 80. After that average was calcu

555-605 (Medium) | Statistics and Sets Problems, Word Problems

555-605 (Medium) | Statistics and Sets Problems, Word Problems hide tags

Bunuel

12 Feb 2015, 07:08

12

5

11,887

by: bumpbot

28 Jul 2025, 10:59

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If the arithmetic mean of n consecutive odd integers is 20, what is

605-655 (Medium) | Statistics and Sets Problems

605-655 (Medium) | Statistics and Sets Problems hide tags

Bunuel

19 Aug 2015, 03:05

117

11

13,803

by: bumpbot

28 Jul 2025, 10:57

ER

K is a data set containing five real numbers. If A is the arithmetic

805+ (Hard) | Statistics and Sets Problems

805+ (Hard) | Statistics and Sets Problems hide tags

Raksat

07 Aug 2018, 10:22

14

5

2,408

by: srik410

27 Jul 2025, 05:20

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Phil took four tests in his chemistry class. His average score after

Sub 505 (Easy) | Statistics and Sets Problems

Sub 505 (Easy) | Statistics and Sets Problems hide tags

Bunuel

24 Jul 2025, 22:00

3

4

690

by: Missinga

26 Jul 2025, 11:30

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S is a set of n consecutive positive integers. Is the mean of the set

655-705 (Hard) | Statistics and Sets Problems

655-705 (Hard) | Statistics and Sets Problems hide tags

Bunuel

08 Oct 2021, 01:30

21

7

8,010

by: bumpbot

25 Jul 2025, 12:02

ER

There is a set of consecutive even integers. What is the

605-655 (Medium) | Statistics and Sets Problems

605-655 (Medium) | Statistics and Sets Problems hide tags

Jinglander

10 Aug 2010, 08:20

54

10

10,322

by: bumpbot

25 Jul 2025, 11:43

ER

If set X and set Y consist of more than 1 element, what is the ratio

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

Bunuel

08 Jul 2020, 02:22

24

16

7,524

by: bumpbot

25 Jul 2025, 11:39

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Is the standard deviation of the numbers in list R less than the stand

705-805 (Hard) | Statistics and Sets Problems

705-805 (Hard) | Statistics and Sets Problems hide tags

parkhydel

28 Apr 2020, 04:52

308

16

25,290

by: bumpbot

24 Jul 2025, 13:04

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Kara attends a university where students study for an average

605-655 (Medium) | Statistics and Sets Problems

605-655 (Medium) | Statistics and Sets Problems hide tags

Bunuel

23 Jul 2025, 22:00

6

3

860

by: agrasan

24 Jul 2025, 01:03

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If m is the arithmetic mean (average) of 4 integers a, b, c, and d and

655-705 (Hard) | Statistics and Sets Problems

655-705 (Hard) | Statistics and Sets Problems hide tags

Bunuel

10 Mar 2016, 04:56

16

3

3,764

by: bumpbot

23 Jul 2025, 00:33

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Was the average (arithmetic mean) sale price of a new home in region R

605-655 (Medium) | Statistics and Sets Problems

605-655 (Medium) | Statistics and Sets Problems hide tags

Carcass

09 Jun 2023, 11:33

64

12

11,729

by: Ayushi2000

22 Jul 2025, 14:41

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On a recent test taken by 21 students, each students test score was

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

houston1980

01 Jul 2023, 09:23

108

3

24,148

by: bumpbot

21 Jul 2025, 07:19

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Set Q contains p numbers, where p > 1. What is the ratio

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

rxs0005

08 Dec 2010, 16:32

12

5

4,335

by: bumpbot

21 Jul 2025, 05:09

ER

What was the median of the daily numbers of phone calls received at a

505-555 (Easy) | Statistics and Sets Problems

505-555 (Easy) | Statistics and Sets Problems hide tags

houston1980

01 Jul 2023, 09:44

63

3

16,128

by: bumpbot

20 Jul 2025, 09:18

ER

What is the median duration of a client engagement, which are billed

655-705 (Hard) | Statistics and Sets Problems

655-705 (Hard) | Statistics and Sets Problems hide tags

Bunuel

16 Aug 2019, 02:39

6

4

2,159

by: bumpbot

18 Jul 2025, 04:48

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The median salary of the employees in the sales department in 1999 was

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

Bunuel

16 Jul 2025, 22:00

6

2

544

by: Souradeep17

17 Jul 2025, 11:14

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Is the tallest child in class A taller than the tallest child in class

555-605 (Medium) | Min-Max Problems, Statistics and Sets Problems

555-605 (Medium) | Min-Max Problems, Statistics and Sets Problems hide tags

TheMechanic

17 Oct 2017, 06:26

49

9

14,463

by: bumpbot

17 Jul 2025, 09:41

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If x, y, and z are integers, and x < y < z, is z y = y

805+ (Hard) | Statistics and Sets Problems

805+ (Hard) | Statistics and Sets Problems hide tags

kairoshan

04 Jul 2013, 23:56

125

12

22,999

by: bumpbot

17 Jul 2025, 02:33

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A car manufacturer organized a test drive of two of its prototypes.

805+ (Hard) | Statistics and Sets Problems

805+ (Hard) | Statistics and Sets Problems hide tags

globaldesi

17 Aug 2020, 22:13

28

10

5,301

by: bumpbot

16 Jul 2025, 22:22

ER

What is the average (arithmetic mean) of x, y, and z ?

Sub 505 (Easy) | Statistics and Sets Problems

Sub 505 (Easy) | Statistics and Sets Problems hide tags

Bunuel

31 Oct 2018, 11:37

6

4

8,518

by: bumpbot

15 Jul 2025, 14:32

ER

Zelma scored 90, 88, and 92 on 3 of the 6 mathematics tests that she

Sub 505 (Easy) | Statistics and Sets Problems

Sub 505 (Easy) | Statistics and Sets Problems hide tags

Bunuel

23 May 2020, 07:12

11

3

8,632

by: bumpbot

15 Jul 2025, 14:32

ER

For the list of numbers above there is exactly one mode. Is the range

705-805 (Hard) | Statistics and Sets Problems

705-805 (Hard) | Statistics and Sets Problems hide tags

Bunuel

19 May 2017, 00:17

37

7

9,332

by: ishita_sud

13 Jul 2025, 12:24

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Working together without a break, Jermaine and Crystal can do a job in

Sub 505 (Easy) | Statistics and Sets Problems

Sub 505 (Easy) | Statistics and Sets Problems hide tags

Bunuel

05 May 2019, 23:32

4

3

2,990

by: bumpbot

13 Jul 2025, 10:55

ER

A scientist recorded the number of eggs in each of 10 birds' nests.

Sub 505 (Easy) | Statistics and Sets Problems

Sub 505 (Easy) | Statistics and Sets Problems hide tags

Bunuel

11 Sep 2012, 04:50

106

12

36,867

by: bumpbot

12 Jul 2025, 19:26

ER

GMAT Club Olympics 2025 (Day 9): What was the average speed of a deliv

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

1, 2, 3, 4

Bunuel

10 Jul 2025, 08:00

69

78

2,821

by: Suyash1331

11 Jul 2025, 07:59

ER

A local municipality did a census of earthworms per acre of soil for 1

655-705 (Hard) | Statistics and Sets Problems

655-705 (Hard) | Statistics and Sets Problems hide tags

Bunuel

31 Aug 2018, 23:04

28

15

6,962

by: BinodBhai

10 Jul 2025, 10:07

ER

What was the median monthly number of gallons of water used by the

Sub 505 (Easy) | Statistics and Sets Problems

Sub 505 (Easy) | Statistics and Sets Problems hide tags

Bunuel

08 Aug 2023, 05:00

26

6

13,862

by: bumpbot

10 Jul 2025, 02:28

ER

At a certain company, a test was given to a group of men and women see

605-655 (Medium) | Statistics and Sets Problems

605-655 (Medium) | Statistics and Sets Problems hide tags

1, 2

rajman41

11 Nov 2017, 07:54

567

20

52,604

by: bumpbot

09 Jul 2025, 00:38

ER

In a certain group, the average (arithmetic mean) age of the males is

605-655 (Medium) | Statistics and Sets Problems, Word Problems

605-655 (Medium) | Statistics and Sets Problems, Word Problems hide tags

Bunuel

25 Jul 2018, 04:15

22

7

12,330

by: adithya000

08 Jul 2025, 12:10

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If two elements are dropped from set X {-10, -8, 0, 6, 7}, what will

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

enigma123

10 Mar 2020, 01:48

30

9

14,658

by: bumpbot

08 Jul 2025, 11:07

ER

Which data set has the greater standard deviation, data set K or data

505-555 (Easy) | Statistics and Sets Problems

505-555 (Easy) | Statistics and Sets Problems hide tags

Bunuel

26 Feb 2015, 06:36

32

13

14,584

by: bumpbot

08 Jul 2025, 10:47

ER

there are 11 numbers in a set, is the median 20?

555-605 (Medium) | Min-Max Problems, Statistics and Sets Problems

555-605 (Medium) | Min-Max Problems, Statistics and Sets Problems hide tags

petrified17

19 Sep 2017, 07:40

35

3

6,542

by: bumpbot

07 Jul 2025, 12:37

ER

Each term of set T is a multiple of 5, is the standard deviation of

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

Jivana

04 Sep 2009, 18:29

133

7

19,779

by: bumpbot

06 Jul 2025, 11:18

ER

What is the average (arithmetic mean) height of the n people in a cert

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

sandalphon

20 Dec 2005, 09:03

157

14

63,743

by: bumpbot

06 Jul 2025, 11:04

ER

If 2 < x < 4, what is the median of the numbers 0, 5, x, 1,

555-605 (Medium) | Algebra, Statistics and Sets Problems

555-605 (Medium) | Algebra, Statistics and Sets Problems hide tags

1, 2

bgribble

30 Nov 2013, 11:54

170

23

49,987

by: bumpbot

06 Jul 2025, 10:58

ER

Given that the mean of Set A is 10, what is the range of two

Sub 505 (Easy) | Statistics and Sets Problems

Sub 505 (Easy) | Statistics and Sets Problems hide tags

smartass666

05 Nov 2012, 21:09

66

10

20,063

by: bumpbot

04 Jul 2025, 13:09

ER

GMAT Club Olympics 2025 (Day 3): Yesterday, on an audio streaming

805+ (Hard) | Statistics and Sets Problems, Word Problems

805+ (Hard) | Statistics and Sets Problems, Word Problems hide tags

1, 2, 3, 4, 5

Bunuel

02 Jul 2025, 08:00

83

84

3,354

by: HarshavardhanR

04 Jul 2025, 00:04

ER

GMAT Club Olympics 2025 (Day 1): In a store, 40 items are arranged on

555-605 (Medium) | Statistics and Sets Problems, Word Problems

555-605 (Medium) | Statistics and Sets Problems, Word Problems hide tags

1, 2...7, 8

Bunuel

30 Jun 2025, 08:00

131

156

5,370

by: twinkle2311

02 Jul 2025, 08:24

ER

GMAT Club Olympics 2024 (Day 1): In a company, the average (arithmetic

805+ (Hard) | Statistics and Sets Problems

805+ (Hard) | Statistics and Sets Problems hide tags

Bunuel

08 Jul 2024, 07:00

94

8

9,388

by: mvgkannan

01 Jul 2025, 11:22

ER

Last school year, each of the 200 students at a certain high school at

555-605 (Medium) | Statistics and Sets Problems, Word Problems

555-605 (Medium) | Statistics and Sets Problems, Word Problems hide tags

1, 2

Bunuel

26 Jun 2017, 02:56

456

25

55,399

by: bumpbot

01 Jul 2025, 10:27

ER

The average (arithmetic mean) of the original six prices for six coats

805+ (Hard) | Statistics and Sets Problems

805+ (Hard) | Statistics and Sets Problems hide tags

gmatophobia

15 Mar 2022, 07:56

17

2

3,916

by: bumpbot

29 Jun 2025, 13:28

ER

What was the median annual salary for the employees at Compan

Sub 505 (Easy) | Statistics and Sets Problems

Sub 505 (Easy) | Statistics and Sets Problems hide tags

Bunuel

21 Jun 2018, 09:20

20

6

23,080

by: bumpbot

29 Jun 2025, 11:32

ER

Kevin, Leo, and Max each received a monetary award for their work on

605-655 (Medium) | Statistics and Sets Problems

605-655 (Medium) | Statistics and Sets Problems hide tags

12922

25 Oct 2023, 23:59

144

5

24,877

by: Bunuel

28 Jun 2025, 11:11

ER

If x is a number in the list above, what is the median of the list?

655-705 (Hard) | Statistics and Sets Problems

655-705 (Hard) | Statistics and Sets Problems hide tags

Bunuel

26 Apr 2019, 03:35

375

19

51,910

by: bumpbot

26 Jun 2025, 09:44

ER

Is the standard deviation of the set of measurements x1, x2,

505-555 (Easy) | Statistics and Sets Problems

505-555 (Easy) | Statistics and Sets Problems hide tags

Bunuel

25 Jun 2012, 03:01

180

14

51,532

by: GMATinsight

26 Jun 2025, 03:13

ER

Is the standard deviation of the numbers X, Y and Z equal to

505-555 (Easy) | Statistics and Sets Problems

505-555 (Easy) | Statistics and Sets Problems hide tags

1, 2

fozzzy

17 Jan 2013, 06:15

137

22

29,836

by: bumpbot

25 Jun 2025, 04:58

ER

Website W receives orders for its products every day. What is the Stan

505-555 (Easy) | Statistics and Sets Problems

505-555 (Easy) | Statistics and Sets Problems hide tags

imhimanshu

08 Oct 2013, 09:01

212

16

52,032

by: bumpbot

25 Jun 2025, 04:23