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

78,554

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

487,771

by: bb

29 Aug 2025, 13:27

ER

49 people read at least one of 3 kinds of magazines last year. How man

505-555 (Easy) | Overlapping Sets

505-555 (Easy) | Overlapping Sets hide tags

Bunuel

20 Jan 2021, 07:02

3

2,139

by: bumpbot

30 Aug 2023, 06:41

ER

450 when multiplied with x results in the square of an integer. Find x

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

GMATinsight

21 Oct 2020, 07:26

8

5

1,513

by: bumpbot

27 Jul 2025, 05:22

ER

40% of the students at a school take a math class and 60% of the schoo

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Poor Quality hide tags

MathRevolution

08 May 2018, 02:51

2

5

2,626

by: MathRevolution

10 May 2018, 07:50

ER

40% of the dogs at a certain animal shelter have been microchipped. Ho

Sub 505 (Easy) | Word Problems

Sub 505 (Easy) | Word Problems hide tags

Bunuel

18 Jul 2019, 08:00

64

4

4,497

by: Mizar18

18 Jul 2019, 20:05

ER

40 people admitted to a certain graduate program had taken the TOEFL

805+ (Hard) | Statistics and Sets Problems

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

kevincan

14 Feb 2026, 07:43

12

9

886

by: totamofficiis

22 Feb 2026, 07:11

ER

4.7☆◎3 If ☆ and ◎ each represent single digits in the decimal above,

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

BIGDAMNGOD

29 May 2020, 05:51

6

4

4,192

by: bumpbot

28 Sep 2022, 13:09

ER

4 numbers: w, 8, y, and z are in arithmetic progression, where w < 8 <

805+ (Hard) | Sequences

805+ (Hard) | Sequences hide tags

Snehaaaaa

30 Mar 2022, 05:54

6

2

1,497

by: bumpbot

10 Apr 2026, 10:10

4 numbers: p, 5, r, and s are in arithmetic progression, if p, r, and

805+ (Hard) | Inequalities, Multiples and Factors

805+ (Hard) | Inequalities, Multiples and Factors hide tags

Sakshi2013

31 May 2025, 12:57

3

1

807

by: Krunaal

31 May 2025, 13:14

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4 men and 10 women were assigned to complete a work. Can they complete

705-805 (Hard) | Work and Rate Problems

705-805 (Hard) | Work and Rate Problems hide tags

Bunuel

05 Jul 2017, 00:45

36

4

6,314

by: bumpbot

16 Jan 2026, 11:19

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3x + 4y = C Kx + 12y = 36 What are the values of x and y ?

605-655 (Medium) | Algebra

605-655 (Medium) | Algebra hide tags

Bunuel

01 Aug 2022, 01:30

5

3

1,784

by: Solenja

25 Aug 2022, 02:37

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35 percent of the books in Richard's collection are novels

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

metallicafan

22 Aug 2012, 19:52

9

6

5,339

by: bumpbot

21 Mar 2024, 01:52

ER

33 out of the 47 students in an advanced degree program have a higher

705-805 (Hard) | Overlapping Sets

705-805 (Hard) | Overlapping Sets hide tags

Bunuel

16 Sep 2015, 07:23

50

5

9,346

by: bumpbot

17 Sep 2024, 02:04

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30%~35% of the employees in a certain company have cell phones. Do at

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BillyZ

23 Feb 2017, 17:51

8

5

3,470

by: mikemcgarry

27 Feb 2017, 12:20

ER

30% of the engineering students attending a certain university are

555-605 (Medium) | Non-Math Related, Overlapping Sets

555-605 (Medium) | Non-Math Related, Overlapping Sets hide tags

Bunuel

22 May 2024, 01:36

10

4

2,991

by: bumpbot

24 Jul 2025, 04:51

ER

30 people in total attended an office party for a

655-705 (Hard) | Word Problems

655-705 (Hard) | Word Problems hide tags

mvivekc

15 Jul 2014, 23:42

49

16

14,488

by: bumpbot

27 Jul 2025, 04:50

ER

3/4 of the employees at a global company are female. If all the employ

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

Bunuel

08 Nov 2021, 01:33

2

1,609

by: globaldesi

08 Nov 2021, 04:16

ER

3*2^x+1=y^2, where x and y are non-negative integers. Find the sum of

705-805 (Hard) | Algebra

705-805 (Hard) | Algebra hide tags

nick1816

13 Sep 2019, 08:40

6

2,448

by: bumpbot

01 Jul 2021, 22:25

ER

3,5,10,7,x. If x is an integer , is the mean of the five numbers

805+ (Hard) | Statistics and Sets Problems

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

nkmungila

10 Oct 2017, 23:24

20

8

8,007

by: bumpbot

05 Sep 2023, 07:17

ER

3^(-(x + y))/3^(-(x - y)) =

555-605 (Medium) | Exponents

555-605 (Medium) | Exponents hide tags

rahulms

27 Jul 2015, 14:47

3

11

4,871

by: thesip2323

10 Apr 2022, 10:25

ER

3 siblings - Alan, Betty and Carl - were the only ones to receive part

705-805 (Hard) | Inequalities, Word Problems

705-805 (Hard) | Inequalities, Word Problems hide tags

EMPOWERgmatRichC

20 Nov 2015, 15:25

14

9

5,056

by: NipunSyn

12 Mar 2025, 06:43

ER

3 lines intersect at point P, so that 6 angles are created. What is th

655-705 (Hard) | Geometry

655-705 (Hard) | Geometry hide tags

GMATBusters

19 Jun 2018, 08:31

6

2

1,538

by: bumpbot

01 Dec 2019, 05:07

ER

3 childrens ages are consecutive even numbers. What is the oldest

505-555 (Easy) | Word Problems

505-555 (Easy) | Word Problems hide tags

Bunuel

24 Jul 2024, 01:30

2

1

1,418

by: Nidzo

24 Jul 2024, 03:00

2x+y<10?

655-705 (Hard) | Inequalities

655-705 (Hard) | Inequalities hide tags

suminha

17 Aug 2020, 22:10

5

2

1,429

by: nehasomani33

19 Aug 2020, 10:15

ER

2x – y = (1) 3x + y = x + 2y (2) (x + y) + 3(x – y) = 0

505-555 (Easy) | Algebra

505-555 (Easy) | Algebra hide tags

Bunuel

09 Feb 2022, 09:30

2

1,297

by: Charli08

13 Feb 2022, 09:33

ER

2x – y =

505-555 (Easy) | Algebra

505-555 (Easy) | Algebra hide tags

vikasp99

06 Mar 2017, 05:08

2

10

3,403

by: bumpbot

09 Jun 2024, 19:35

ER

2ax + 5y = 17 4x + 6by = 11 In the x-y plane, the above two straight

605-655 (Medium) | Coordinate Plane, Geometry

605-655 (Medium) | Coordinate Plane, Geometry hide tags

mangamma

13 Jun 2019, 00:24

8

4

3,682

by: bumpbot

13 Jan 2022, 11:16

ER

2ab5 is a four-digit number. What is the value of the two-digit number

555-605 (Medium) | Multiples and Factors

555-605 (Medium) | Multiples and Factors hide tags

Bunuel

27 Jul 2022, 09:30

3

1

1,335

by: gmatophobia

02 Jan 2023, 12:03

ER

2a3 is a 3-digit positive integer. If 2a3 + 366 = 6b9, what is the

655-705 (Hard) | Multiples and Factors

655-705 (Hard) | Multiples and Factors hide tags

Bunuel

07 Jun 2023, 08:15

1

1,279

by: JeffTargetTestPrep

08 Jun 2023, 09:16

ER

28 students were each assigned to one of five classes: Anthropology, B

505-555 (Easy) | Inequalities

505-555 (Easy) | Inequalities hide tags

TheUltimateWinner

19 Feb 2020, 13:56

2

3

3,236

by: bumpbot

28 May 2021, 06:11

ER

27 balls are separated into 3 groups with different number of balls,

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

MahmoudFawzy

15 Jul 2019, 17:12

9

5

3,105

by: bumpbot

11 Aug 2025, 09:22

ER

261,634,24x If x represents the units digit of the number above, what

605-655 (Medium) | Multiples and Factors

605-655 (Medium) | Multiples and Factors hide tags

Bunuel

02 Jun 2016, 11:59

4

3

3,041

by: stonecold

19 Nov 2016, 02:31

25<X<28, where X represents the number of factors of Joey's house

705-805 (Hard) | Exponents +2 tags

705-805 (Hard) | Exponents, Multiples and Factors, Number Properties hide tags

PrepTap

24 Apr 2015, 05:16

10

4

3,174

by: bumpbot

01 Apr 2021, 03:57

ER

25 integers are written on a board. Are there at least two consecutive

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

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

Bunuel

08 Apr 2015, 05:27

40

15

10,084

by: bumpbot

03 Aug 2025, 13:32

ER

25 Hardest DS Questions (2025-2026)

655-705 (Hard) | Multiples and Factors

655-705 (Hard) | Multiples and Factors hide tags

bb

04 Mar 2026, 23:43

4

0

385

by: bb

04 Mar 2026, 23:43

ER

240 students are to be arranged in n rows in the assembly hall

655-705 (Hard) | Algebra, Number Properties

655-705 (Hard) | Algebra, Number Properties hide tags

kiran120680

14 Mar 2019, 06:14

11

5

5,531

by: bumpbot

20 Apr 2023, 04:56

ER

23 students appeared for the Geography paper. What is the sum of marks

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

21 Nov 2019, 03:28

13

3

3,506

by: bumpbot

06 Dec 2025, 13:40

ER

21, 17, 9, 12, x, 5, 0, y What is the value of x in the list above?

505-555 (Easy) | Algebra, Statistics and Sets Problems

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

Bunuel

31 Jan 2019, 01:28

2

1,143

by: Archit3110

31 Jan 2019, 03:26

ER

2001, the closing price of stock A and stock B are the same.

655-705 (Hard) | Percent and Interest Problems

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

mehdiov

20 Aug 2010, 11:51

80

8

14,361

by: bumpbot

16 Sep 2025, 10:40

ER

200 students in an MBA program voted for 2 electives A and B to be inc

655-705 (Hard) | Overlapping Sets

655-705 (Hard) | Overlapping Sets hide tags

Bunuel

14 Jun 2022, 13:15

1

1,340

by: Aks111

14 Jun 2022, 21:35

ER

20 percent of the households in Ruterberg have pets. If 15 percent of

555-605 (Medium) | Overlapping Sets

555-605 (Medium) | Overlapping Sets hide tags

Bunuel

13 Dec 2024, 01:30

3

2

1,849

by: shoaibshariff07

13 Dec 2024, 03:49

ER

20 books, each on a different subject, are placed on a shelf

655-705 (Hard) | Word Problems

655-705 (Hard) | Word Problems hide tags

amanvermagmat

24 Feb 2018, 00:12

3

2,806

by: bumpbot

11 Sep 2025, 05:04

ER

2/3 of all the people who attended a certain party arrived by 8:00 PM.

555-605 (Medium) | Fractions and Ratios

555-605 (Medium) | Fractions and Ratios hide tags

shasadou

10 Nov 2015, 12:00

54

9

15,560

by: bumpbot

10 Mar 2025, 18:00

ER

2, 4, 5, 5, 9, m For the list of numbers above, what is the median?

555-605 (Medium) | Statistics and Sets Problems

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

Bunuel

10 Jun 2015, 04:09

30

7

8,473

by: bumpbot

26 Apr 2025, 05:59

ER

2^(x+y)/2^(x-y)=?

505-555 (Easy) | Exponents

505-555 (Easy) | Exponents hide tags

MathRevolution

12 Jul 2016, 19:05

14

16

9,549

by: bumpbot

31 Jul 2020, 21:37

ER

2 circles have the same center and the smaller circle’s radius r is 5.

505-555 (Easy) | Geometry

505-555 (Easy) | Geometry hide tags

MathRevolution

29 May 2016, 20:54

3

4,620

by: MathRevolution

01 Jun 2016, 06:38

16 numbers (not necessarily distinct) are filled in the 4x4 square gri

805+ (Hard) | Combinations, Number Properties

805+ (Hard) | Combinations, Number Properties hide tags

nick1816

06 Apr 2020, 19:49

25

8

7,291

by: hadimadi

02 Jan 2022, 06:42

ER

16 horses can haul a load of lumber in 24 minutes. 12 horses

555-605 (Medium) | Work and Rate Problems

555-605 (Medium) | Work and Rate Problems hide tags

1, 2

daviesj

22 Feb 2013, 03:21

151

21

17,051

by: Aboyhasnoname

18 Sep 2025, 20:08

ER

15a + 6b = 30, what is the value of a - b ?

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

24 Dec 2019, 13:55

13

10

3,752

by: AkshadSoman

11 Sep 2023, 04:26

ER

150 representatives of an organization participated in a survey. 50%

705-805 (Hard) | Overlapping Sets

705-805 (Hard) | Overlapping Sets hide tags

Bunuel

05 Jan 2022, 04:30

18

8

4,637

by: belro

02 Nov 2025, 22:40

ER

15 members of a small club are all standing in a queue for the collect

705-805 (Hard) | Number Properties, Word Problems

705-805 (Hard) | Number Properties, Word Problems hide tags

amanvermagmat

08 Apr 2018, 05:24

3

2,254

by: bumpbot

14 Jan 2025, 09:06