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

183

15

83,862

by: thisisakr

16 Apr 2026, 11:46

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100 Hardest and easiest questions for DS as of May 2026

1, 2

Bunuel

01 Jan 2026, 05:45

863

24

191,862

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

491,859

by: bb

29 Aug 2025, 13:27

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

3,075

by: stonecold

19 Nov 2016, 02:31

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

10

5

3,227

by: bumpbot

11 Aug 2025, 09:22

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

3,277

by: bumpbot

28 May 2021, 06:11

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

1,313

by: JeffTargetTestPrep

08 Jun 2023, 09:16

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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

1,366

by: gmatophobia

02 Jan 2023, 12:03

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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

3,723

by: bumpbot

13 Jan 2022, 11:16

ER

2x – y =

505-555 (Easy) | Algebra

505-555 (Easy) | Algebra hide tags

vikasp99

06 Mar 2017, 05:08

2

10

3,449

by: bumpbot

09 Jun 2024, 19:35

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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

1,331

by: Charli08

13 Feb 2022, 09:33

2x+y<10?

655-705 (Hard) | Inequalities

655-705 (Hard) | Inequalities hide tags

suminha

17 Aug 2020, 22:10

5

2

1,467

by: nehasomani33

19 Aug 2020, 10:15

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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

1,464

by: Nidzo

24 Jul 2024, 03:00

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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

1,592

by: bumpbot

01 Dec 2019, 05:07

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

16

9

5,156

by: bumpbot

11 Jun 2026, 04:43

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

4,933

by: thesip2323

10 Apr 2022, 10:25

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

8,071

by: bumpbot

05 Sep 2023, 07:17

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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

8

6

2,496

by: bumpbot

01 Jul 2021, 22:25

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

1,663

by: globaldesi

08 Nov 2021, 04:16

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

14,557

by: bumpbot

27 Jul 2025, 04:50

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

3,143

by: bumpbot

24 Jul 2025, 04:51

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

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Poor Quality hide tags

BillyZ

23 Feb 2017, 17:51

8

5

3,507

by: mikemcgarry

27 Feb 2017, 12:20

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

9,433

by: bumpbot

17 Sep 2024, 02:04

ER

35 percent of the books in Richard's collection are novels and 60 perc

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

metallicafan

14 May 2026, 06:07

10

6

5,438

by: bumpbot

11 Jun 2026, 04:57

ER

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

1,824

by: Solenja

25 Aug 2022, 02:37

ER

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

37

4

6,401

by: bumpbot

16 Jan 2026, 11:19

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

855

by: Krunaal

31 May 2025, 13:14

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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

1,590

by: bumpbot

10 Apr 2026, 10:10

ER

4 raffle winners were each given the opportunity to select one

605-655 (Medium) | Arithmetic, Word Problems

605-655 (Medium) | Arithmetic, Word Problems hide tags

EMPOWERgmatRichC

01 Nov 2015, 17:36

10

6

4,591

by: bumpbot

10 Mar 2025, 06:54

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

4,241

by: bumpbot

28 Sep 2022, 13:09

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

13

9

982

by: totamofficiis

22 Feb 2026, 07:11

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

8

5

4,677

by: bumpbot

01 May 2026, 03:46

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

2,667

by: MathRevolution

10 May 2018, 07:50

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

1,562

by: bumpbot

27 Jul 2025, 05:22

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

2,186

by: bumpbot

30 Aug 2023, 06:41

ER

5.6 percent of the people in the labor force of Pretendville were unem

505-555 (Easy) | Word Problems

505-555 (Easy) | Word Problems hide tags

Bunuel

21 Oct 2022, 01:30

3

2

1,296

by: Rabab36

03 Jan 2023, 11:18

ER

50 animals competed for prizes at a certain fair. How many of the anim

Sub 505 (Easy) | Overlapping Sets

Sub 505 (Easy) | Overlapping Sets hide tags

TheUltimateWinner

03 Jun 2020, 13:25

3

2

2,352

by: bumpbot

01 Oct 2024, 02:21

ER

50 animals competed for prizes at a certain fair. How many of the anim

Sub 505 (Easy) | Overlapping Sets

Sub 505 (Easy) | Overlapping Sets hide tags

TheUltimateWinner

03 Jun 2020, 13:27

3

8

3,130

by: bumpbot

01 Oct 2024, 02:20

50 animals competed for prizes at a certain fair. How many of the anim

505-555 (Easy) | Overlapping Sets

505-555 (Easy) | Overlapping Sets hide tags

TheUltimateWinner

03 Jun 2020, 13:26

6

3

3,106

by: bumpbot

01 Oct 2024, 02:16

ER

50 equally efficient people were employed to complete a work in 90 day

555-605 (Medium) | Work and Rate Problems

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

Bunuel

05 Jul 2017, 00:40

12

8

4,212

by: bumpbot

11 Oct 2023, 05:08

ER

50 jars sit on a shelf, of which 12 are red and not round; and 30 are

555-605 (Medium) | Overlapping Sets

555-605 (Medium) | Overlapping Sets hide tags

Bunuel

18 Sep 2024, 01:30

2

1

724

by: Abdelaali91

18 Sep 2024, 12:42

ER

50 machines work in parallel and no-stop. Each machine can produce

655-705 (Hard) | Work and Rate Problems

655-705 (Hard) | Work and Rate Problems hide tags

Bunuel

04 Oct 2024, 01:30

14

7

2,126

by: Bunuel

21 Dec 2025, 00:19

ER

50 students of a certain class took a test. How many of them got a sco

555-605 (Medium) | Statistics and Sets Problems

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

Bunuel

19 May 2021, 07:00

5

5,753

by: bumpbot

31 Mar 2022, 03:46

ER

50% of the country's population work in Information Technology.

605-655 (Medium) | Overlapping Sets

605-655 (Medium) | Overlapping Sets hide tags

GMATBusters

04 Jan 2020, 19:17

4

17

3,681

by: bumpbot

13 Jun 2021, 09:38

ER

50% of the factory workers are not older than 30 years old. What perce

555-605 (Medium) | Percent and Interest Problems

555-605 (Medium) | Percent and Interest Problems hide tags

Bunuel

14 Jan 2020, 05:15

1

2

4,446

by: bumpbot

30 Apr 2024, 14:59

ER

55 people live in an apartment complex with three fitness

705-805 (Hard) | Overlapping Sets

705-805 (Hard) | Overlapping Sets hide tags

Tagger

15 Apr 2013, 06:36

111

15

25,927

by: bumpbot

25 Nov 2025, 22:16

ER

64 candidates are competing for 5 positions at a consulting

705-805 (Hard) | Combinations, Probability

705-805 (Hard) | Combinations, Probability hide tags

fozzzy

23 May 2013, 09:33

82

7

11,274

by: Adit_

10 Feb 2026, 02:41

7 married couples are sitting in the lounge of a certain

605-655 (Medium) | Inequalities, Min-Max Problems

605-655 (Medium) | Inequalities, Min-Max Problems hide tags

amanvermagmat

10 Mar 2018, 11:56

6

3

3,138

by: bumpbot

29 Jun 2025, 23:19

ER

7 students each bought some books on a book fair. Is the total number

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

Zed3092

03 Dec 2018, 03:46

6

2

2,452

by: kylebecker9

03 Dec 2018, 11:26

ER

70% of students at a school joined the soccer club and 60% joined the

555-605 (Medium) | Overlapping Sets

555-605 (Medium) | Overlapping Sets hide tags

MathRevolution

16 Jul 2018, 01:05

5

3

2,408

by: bumpbot

15 Jan 2025, 02:38

ER

78% of all students at a school enrolled in an English class and 79% e

555-605 (Medium) | Fractions and Ratios

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

MathRevolution

21 Jun 2018, 01:42

3

4

2,120

by: bumpbot

15 Oct 2025, 19:58

ER

8 cities, including Memphis, are finalists to be chosen to host a poli

Sub 505 (Easy) | Probability

Sub 505 (Easy) | Probability hide tags

Bunuel

03 Nov 2014, 08:06

21

2

14,795

by: BrentGMATPrepNow

05 Sep 2018, 06:49

ER

8 people in a room: A, B, C, D, E, F, G, H, have an average age of 36

705-805 (Hard) | Arithmetic, Word Problems

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

amanvermagmat

03 Mar 2018, 03:26

4

3

2,804

by: bumpbot

12 Mar 2025, 01:53