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

175

15

78,556

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

188,425

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

487,772

by: bb

29 Aug 2025, 13:27

ER

What is the average of a, b and c?

605-655 (Medium) | Statistics and Sets Problems

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

suk1234

31 Jul 2014, 14:50

17

6

36,299

by: Bunuel

03 Oct 2025, 07:42

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12 Days of Christmas GMAT Competition - Day 8: Set X = {a, b, c, d, 9}

805+ (Hard) | Statistics and Sets Problems

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

Bunuel

21 Dec 2020, 19:00

50

11

7,125

by: bumpbot

03 Oct 2025, 02:46

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The King Edward College team won 25% of its first games and went on to

805+ (Hard) | Min-Max Problems, Statistics and Sets Problems

805+ (Hard) | Min-Max Problems, Statistics and Sets Problems hide tags

snorkeler

14 Nov 2016, 09:47

128

16

12,699

by: bumpbot

03 Oct 2025, 01:44

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x is an integer greater than 7. What is the median of the set of integ

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

14 Oct 2014, 06:20

43

16

13,002

by: Bunuel

02 Oct 2025, 09:39

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If the average (arithmetic mean) of w, p, q, and t is m, is the standa

655-705 (Hard) | Statistics and Sets Problems

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

siddharthkapoor

01 Oct 2020, 20:43

11

4

2,819

by: bumpbot

02 Oct 2025, 08:27

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The total cost of producing item X is equal to the sum of

655-705 (Hard) | Percent and Interest Problems, Statistics and Sets Problems

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

1, 2

knabi

18 Jul 2010, 20:54

171

29

40,769

by: Bunuel

01 Oct 2025, 07:23

Is d greater than or equal to 0? 1). d is the median of d, 1/d, -d 2).

805+ (Hard) | Statistics and Sets Problems

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PriyankaPalit7

18 Mar 2019, 10:38

36

7

5,226

by: bumpbot

30 Sep 2025, 13:34

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Find the Median of the set of integers A? 1) Mean of the set A is 10

655-705 (Hard) | Statistics and Sets Problems

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

GMATinsight

22 May 2017, 08:26

14

5

2,747

by: bumpbot

30 Sep 2025, 10:20

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If x is an integer, how many even numbers does set (0, x,

705-805 (Hard) | Statistics and Sets Problems

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

lhskev

12 Oct 2012, 10:42

47

10

13,281

by: bumpbot

30 Sep 2025, 09:08

ER

A set consists of n consecutive integers in which the smalle

805+ (Hard) | Statistics and Sets Problems

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

1, 2

vibhav

21 Jul 2013, 07:22

221

20

23,357

by: bumpbot

30 Sep 2025, 06:20

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Last week the average (arithmetic mean) of the daily costs of John's

555-605 (Medium) | Statistics and Sets Problems

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

guddo

24 Jan 2024, 01:30

37

4

9,655

by: bumpbot

29 Sep 2025, 12:16

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If Q is a set of consecutive integers, what is the standard

605-655 (Medium) | Statistics and Sets Problems

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

CharuKapoor

24 Nov 2019, 02:36

144

12

16,399

by: bumpbot

29 Sep 2025, 08:17

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Last year, the five employees of company X took an average

605-655 (Medium) | Statistics and Sets Problems

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

GMAT10

22 Aug 2012, 01:28

107

17

27,747

by: bumpbot

29 Sep 2025, 07:36

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If the average (arithmetic mean) of 4 numbers is 50, how man

555-605 (Medium) | Statistics and Sets Problems

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

Bunuel

20 Feb 2014, 01:11

54

7

27,324

by: bumpbot

28 Sep 2025, 16:11

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If x,y,and z are positive numbers,what is the value of the average (ar

555-605 (Medium) | Statistics and Sets Problems

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

1, 2

AbdurRakib

24 Jun 2017, 03:22

302

27

59,191

by: bumpbot

28 Sep 2025, 16:07

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Is the standard deviation of set Q equal to 0? (1) The average (arith

605-655 (Medium) | Statistics and Sets Problems

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

Bunuel

26 May 2021, 03:30

5

3

1,712

by: sanyagoyal812

28 Sep 2025, 09:17

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What is the average of the consecutive integers m through n, inclusiv

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

18 May 2022, 06:30

9

4

2,142

by: bumpbot

28 Sep 2025, 06:53

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Quick Sell Outlet sold a total of 40 televisions, each of

655-705 (Hard) | Statistics and Sets Problems

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

1, 2

bulletpoint

14 Oct 2013, 08:51

625

22

84,190

by: egmat

26 Sep 2025, 03:28

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Set A contains 20 numbers and Set B contains 40 numbers. Is

555-605 (Medium) | Statistics and Sets Problems

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

piyushksharma

10 May 2012, 06:17

22

7

7,576

by: bumpbot

26 Sep 2025, 00:25

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List Q contains 3 elements. What is the median of list Q ? (1) The mea

555-605 (Medium) | Statistics and Sets Problems

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

Bunuel

05 Mar 2019, 05:19

9

6

2,095

by: bumpbot

25 Sep 2025, 14:33

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What is the standard deviation of the set {a, b, c, d, e} ?

555-605 (Medium) | Statistics and Sets Problems

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

CAMANISHPARMAR

06 Jan 2020, 01:03

7

3

5,765

by: bumpbot

25 Sep 2025, 03:55

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If a, b, c, and d are different positive odd numbers, what is the medi

655-705 (Hard) | Statistics and Sets Problems

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

BillyZ

27 Mar 2017, 17:57

21

9

8,234

by: Ashley98789

24 Sep 2025, 19:52

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If set S consists of even number of integers, is the median

805+ (Hard) | Statistics and Sets Problems

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

1, 2

mirhaque

21 Feb 2005, 05:53

82

28

23,104

by: bumpbot

23 Sep 2025, 23:03

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If the average of four distinct positive integers is 60, how many inte

805+ (Hard) | Statistics and Sets Problems

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

Bunuel

06 Feb 2019, 05:45

25

11

12,921

by: bumpbot

23 Sep 2025, 16:45

ER

How many books in a certain library have more than 250 pages?

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

26 Jan 2022, 03:30

12

4

2,889

by: Ters

23 Sep 2025, 06:09

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What is the median of m, n and 5?

555-605 (Medium) | Statistics and Sets Problems

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

Bunuel

23 Jun 2023, 04:00

2

1,170

by: bumpbot

21 Sep 2025, 07:19

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The average score of x number of exams is y. When an additional exam

705-805 (Hard) | Statistics and Sets Problems

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

Bunuel

08 Oct 2014, 14:23

38

5

12,650

by: bumpbot

18 Sep 2025, 11:47

ER

For a set of 3 numbers, assuming there is only one mode,

705-805 (Hard) | Statistics and Sets Problems

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

xcusemeplz2009

16 Dec 2009, 22:36

28

15

9,391

by: bumpbot

18 Sep 2025, 05:58

ER

If x ≤ 4 and y ≥ 10, what is the range of the numbers in the set {5, 8

705-805 (Hard) | Statistics and Sets Problems

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

Bunuel

22 Dec 2015, 03:18

14

8

6,438

by: bumpbot

17 Sep 2025, 21:50

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The average of 5 different numbers is 14. What is the average (arithme

555-605 (Medium) | Statistics and Sets Problems

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

Bunuel

30 Oct 2019, 21:33

3

7

3,804

by: bumpbot

17 Sep 2025, 16:50

In a set S={x,12,12,12,14,10,8}, is x positive? 1) The mode of S is gr

605-655 (Medium) | Statistics and Sets Problems

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

TheUltimateWinner

11 Aug 2019, 09:37

7

2

1,712

by: bumpbot

17 Sep 2025, 03:20

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A set contains the following 5 numbers: a^2, a^5, a, a/2, a/5. Is the

805+ (Hard) | Statistics and Sets Problems

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1, 2

akhil911

25 Mar 2016, 04:55

174

26

22,839

by: bumpbot

16 Sep 2025, 09:59

ER

Set S consist of the values 11, -9, 100, 0, x, and y. if x not equal

555-605 (Medium) | Statistics and Sets Problems

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

Bunuel

15 Jul 2018, 21:41

10

3

3,462

by: bumpbot

16 Sep 2025, 09:35

ER

If x and y are positive integers, is x^17 - 2*y^3 odd?

705-805 (Hard) | Multiples and Factors +2 tags

705-805 (Hard) | Multiples and Factors, Number Properties, Statistics and Sets Problems hide tags

Bunuel

15 Dec 2020, 01:15

10

6

2,386

by: bumpbot

15 Sep 2025, 18:06

ER

At a certain university, all employees can be categorized as either pr

705-805 (Hard) | Statistics and Sets Problems

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

Bunuel

18 May 2017, 00:18

31

8

7,540

by: bumpbot

15 Sep 2025, 13:58

ER

If the square root of the product of three distinct positive

705-805 (Hard) | Number Properties, Statistics and Sets Problems

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

Bunuel

05 Jul 2013, 15:19

73

15

18,949

by: bumpbot

15 Sep 2025, 11:43

ER

Set S has a range of p and the largest number in set S is v. Set T has

705-805 (Hard) | Statistics and Sets Problems

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

Bunuel

27 May 2018, 10:27

5

2

2,532

by: PSKhore

15 Sep 2025, 11:38

ER

If x and y are the standard deviations of two different data sets, is

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

29 Apr 2018, 09:24

20

8

3,965

by: Bunuel

14 Sep 2025, 01:55

ER

In a set of 5 numbers, if the largest number is 3 more than

655-705 (Hard) | Statistics and Sets Problems

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

rajatr

25 Apr 2013, 03:19

20

7

5,713

by: bumpbot

14 Sep 2025, 01:12

ER

In a certain company, the average (arithmetic mean) salary of finance

705-805 (Hard) | Statistics and Sets Problems

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

GMATBusters

07 Oct 2018, 05:26

13

14

3,851

by: bumpbot

12 Sep 2025, 04:32

ER

What is the median value of the set R, if for every term in

655-705 (Hard) | Statistics and Sets Problems

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

rochak22

05 Jul 2021, 00:40

112

19

36,624

by: bumpbot

11 Sep 2025, 18:01

ER

Set X and set Y have 10 numbers each. Is standard deviation of set X

605-655 (Medium) | Statistics and Sets Problems

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

exam_explorer

11 Oct 2023, 03:42

6

5

1,905

by: bumpbot

11 Sep 2025, 07:33

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Is the standard deviation of numbers w, x, y and z greater than 2?

605-655 (Medium) | Statistics and Sets Problems

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

gmatrant

10 Aug 2010, 19:43

22

9

7,340

by: bumpbot

11 Sep 2025, 05:55

ER

All the apartments in a certain building are either three-bedroom apar

655-705 (Hard) | Statistics and Sets Problems

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

gmatophobia

24 Feb 2024, 14:47

97

7

15,567

by: Bunuel

10 Sep 2025, 10:42

ER

Is the median of the five numbers a,b,c,d,e and e equal to d?

505-555 (Easy) | Arithmetic +2 tags

505-555 (Easy) | Arithmetic, Number Properties, Statistics and Sets Problems hide tags

AbdurRakib

30 Jun 2016, 14:12

99

10

30,687

by: bumpbot

08 Sep 2025, 11:27

ER

All but 5 students in a certain calculus class took the final exam on

555-605 (Medium) | Statistics and Sets Problems

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

guddo

24 Jan 2024, 01:11

61

12

12,730

by: quasipariatur

08 Sep 2025, 04:57

ER

In a certain set of five numbers the median is 200

705-805 (Hard) | Statistics and Sets Problems

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

tom09b

03 Mar 2012, 12:39

98

13

12,884

by: bumpbot

08 Sep 2025, 01:52

ER

Of the 90 houses in a certain community, 60 have a garden. How many

705-805 (Hard) | Statistics and Sets Problems

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

pushpitkc

16 Oct 2017, 13:47

26

6

6,399

by: bumpbot

07 Sep 2025, 13:33

ER

During an experiment, some water was removed from each of

555-605 (Medium) | Statistics and Sets Problems

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

vaivish1723

13 May 2010, 04:07

429

19

72,236

by: bumpbot

07 Sep 2025, 05:13

ER

What is the average (arithmetic mean) of 3x and 6y? (1) x + 2y = 7

505-555 (Easy) | Statistics and Sets Problems

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

Carcass

02 Nov 2018, 03:54

10

5

7,459

by: bumpbot

05 Sep 2025, 09:01