GMAT Data Sufficiency (DS) Forum - Free Practice Questions

ER

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

Bunuel

25 Oct 2022, 08:11

176

15

78,576

by: thisisakr

16 Apr 2026, 11:46

ER

100 Hardest and easiest questions for DS as of March 2026

1, 2

Bunuel

01 Jan 2026, 05:45

854

24

188,431

by: bumpbot

16 Sep 2025, 06:05

ER

DS Question Directory by Topic and Difficulty

bb

29 Aug 2025, 13:27

1.5k

0

487,779

by: bb

29 Aug 2025, 13:27

ER

Is x less than y? (1) x - y + 1 < 0 (2) x - y - 1 < 0

555-605 (Medium) | Inequalities

555-605 (Medium) | Inequalities hide tags

banksy

21 Sep 2019, 16:38

143

13

30,346

by: bumpbot

02 Sep 2025, 12:01

ER

S is a set of integers such that i) if a is in S, then a is

555-605 (Medium) | Statistics and Sets Problems

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

banksy

24 Feb 2011, 14:15

110

16

23,372

by: Bunuel

30 Aug 2025, 08:54

ER

What is the value of x?

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

banksy

26 Feb 2011, 17:37

33

7

14,341

by: bumpbot

13 Jun 2025, 04:37

ER

If x and y are positive integers, what is the remainder when

555-605 (Medium) | Exponents, Remainders

555-605 (Medium) | Exponents, Remainders hide tags

banksy

18 Feb 2011, 12:00

97

5

22,605

by: bumpbot

16 May 2025, 19:02

ER

If b is an integer, is (a^2 + b^2)^(1/2) an integer?

555-605 (Medium) | Algebra, Number Properties

555-605 (Medium) | Algebra, Number Properties hide tags

banksy

26 Feb 2011, 16:45

124

13

27,628

by: bumpbot

01 Apr 2025, 03:21

ER

If x and y are positive integers and x is a multiple of y,

655-705 (Hard) | Multiples and Factors

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

banksy

26 Feb 2011, 17:44

41

7

25,921

by: bumpbot

19 Feb 2025, 03:35

ER

If m, n, , and q are positive integers, and m = nq, what is

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

banksy

10 Feb 2011, 16:04

5

3

6,112

by: Bunuel

08 Feb 2025, 01:47

ER

How many prime factors does positive integer n have?

805+ (Hard) | Multiples and Factors, Number Properties

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

banksy

29 Mar 2011, 12:30

43

10

14,336

by: bumpbot

07 Dec 2024, 23:25

ER

In the xy-plane, circle C is tangent with x-axis and y-axis.

655-705 (Hard) | Coordinate Plane, Geometry

655-705 (Hard) | Coordinate Plane, Geometry hide tags

banksy

09 Mar 2011, 15:02

23

11

10,776

by: bumpbot

29 Nov 2024, 07:33

ER

In a certain company, if 75% of the employees usually use a

655-705 (Hard) | Overlapping Sets

655-705 (Hard) | Overlapping Sets hide tags

banksy

10 Feb 2011, 16:59

27

14

11,076

by: bumpbot

27 Feb 2024, 10:00

ER

If x y = 4, is x < 2?

655-705 (Hard) | Inequalities

655-705 (Hard) | Inequalities hide tags

banksy

14 Feb 2011, 15:49

10

3

4,667

by: bumpbot

17 Feb 2024, 07:10

ER

What is the ratio of r to s?

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

banksy

29 Jul 2013, 08:29

38

14

18,538

by: bumpbot

20 Nov 2023, 19:39

ER

In a certain class, boys' heights range is 10 inches, and

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

banksy

04 Mar 2011, 19:42

6

5

5,189

by: bumpbot

24 Oct 2023, 01:12

ER

Is x < 0 ? (1) x^3 < x^2 (2) x^3 < x^4

655-705 (Hard) | Inequalities

655-705 (Hard) | Inequalities hide tags

banksy

01 Mar 2011, 10:51

15

7

17,104

by: bumpbot

20 Sep 2023, 07:01

ER

If x and y are prime numbers, what is the value of |x-y|?

705-805 (Hard) | Absolute Values

705-805 (Hard) | Absolute Values hide tags

banksy

07 Sep 2013, 06:02

49

11

11,448

by: bumpbot

04 Jun 2023, 20:40

ER

If x is not equal to 1, is x^2/(x-1) greater than x?

705-805 (Hard) | Inequalities

705-805 (Hard) | Inequalities hide tags

banksy

18 Feb 2011, 11:58

9

4

4,293

by: bumpbot

01 Aug 2022, 08:27

ER

If x < y < z, is xyz > 0?

555-605 (Medium) | Inequalities

555-605 (Medium) | Inequalities hide tags

banksy

09 Mar 2011, 15:01

7

14

7,929

by: bumpbot

16 Jul 2022, 14:48

ER

If line l passes through point (m, n), is the slope of the

655-705 (Hard) | Coordinate Plane

655-705 (Hard) | Coordinate Plane hide tags

banksy

15 Feb 2011, 13:12

12

9

8,329

by: frombelarus

08 Jun 2022, 13:15

ER

If p and q are prime numbers, where p is no more than q, is

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

banksy

10 Feb 2011, 16:05

6

8,291

by: Papai21

23 Oct 2021, 13:17

ER

There are less than 50 books are to be divided by students.

705-805 (Hard) | Remainders

705-805 (Hard) | Remainders hide tags

banksy

14 Feb 2011, 15:45

6

5,578

by: bumpbot

16 Sep 2021, 02:39

ER

Is |x – 3| > |y – 3|?

555-605 (Medium) | Absolute Values, Inequalities

555-605 (Medium) | Absolute Values, Inequalities hide tags

banksy

25 Jul 2013, 02:13

38

18

9,120

by: CEdward

03 Feb 2021, 12:51

ER

If x = 5 y, is x > 0?

605-655 (Medium) | Inequalities

605-655 (Medium) | Inequalities hide tags

banksy

14 Mar 2011, 16:34

4

11

4,897

by: CrackverbalGMAT

23 Jan 2020, 03:57

ER

In the figure above, if DE is parallel to , what is the sum

655-705 (Hard) | Geometry

655-705 (Hard) | Geometry hide tags

banksy

15 Feb 2011, 08:04

3

4

5,057

by: bumpbot

18 Oct 2017, 08:35

ER

If x is an integer, is y an integer?

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

banksy

03 Sep 2017, 06:44

2

4

6,488

by: Bunuel

03 Sep 2017, 06:43

ER

Is ab > 0?

605-655 (Medium) | Inequalities

605-655 (Medium) | Inequalities hide tags

banksy

15 Feb 2011, 13:09

7

4

5,364

by: bumpbot

22 Apr 2017, 09:28

What is the value of N?

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

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

banksy

16 Mar 2011, 09:03

2

4

3,916

by: hdwnkr

24 Dec 2015, 12:02

ER

For positive integer x, y, and z, is y > z?

555-605 (Medium) | Remainders

555-605 (Medium) | Remainders hide tags

banksy

17 Mar 2011, 14:42

4

1

5,007

by: Bunuel

21 Jun 2012, 12:25

ER

Square R is inscribed in circle C and C is inscribed in

655-705 (Hard) | Geometry

655-705 (Hard) | Geometry hide tags

banksy

14 Feb 2011, 15:50

7

1

7,582

by: Bunuel

14 Feb 2011, 16:57

ER

If p and n are positive integers and p > n, what is the remainder when

705-805 (Hard) | Remainders

705-805 (Hard) | Remainders hide tags

1, 2

BANON

23 Feb 2012, 08:10

598

30

100,817

by: Bunuel

20 Mar 2026, 06:03

ER

For the students in class A, the range of their heights is r centimete

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

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

BANON

23 Feb 2012, 08:12

269

14

55,702

by: totaltestprepNick

04 Mar 2026, 11:28

ER

If p is a positive odd integer, what is the remainder when p is divide

705-805 (Hard) | Remainders

705-805 (Hard) | Remainders hide tags

BANON

23 Feb 2012, 08:09

661

9

87,436

by: bumpbot

20 Sep 2025, 01:42

ER

If r and s are positive integers, is r/s an integer?

555-605 (Medium) | Multiples and Factors

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

1, 2

BANON

23 Feb 2012, 08:13

367

22

75,628

by: bumpbot

04 Sep 2025, 21:45

ER

Lines n and p lie in the xy-plane. Is the slope of line n less than th

605-655 (Medium) | Coordinate Plane

605-655 (Medium) | Coordinate Plane hide tags

1, 2

BANON

23 Feb 2012, 08:07

489

37

75,927

by: bumpbot

19 Aug 2025, 20:58

ER

If x + y is an integer, is y an integer?

605-655 (Medium) | Number Properties

605-655 (Medium) | Number Properties hide tags

BANON

01 Mar 2012, 08:39

21

10

15,243

by: bumpbot

29 Oct 2024, 23:23

ER

If a and b are positive, is (a^(-1) + b^(-1))^(-1) less than

655-705 (Hard) | Exponents, Inequalities

655-705 (Hard) | Exponents, Inequalities hide tags

barakhaiev

11 Oct 2013, 06:44

4

3

4,179

by: Bunuel

11 Oct 2013, 06:46

What is the value of X? 1) X is a mode of 2) X is neither

505-555 (Easy) | Statistics and Sets Problems

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

BarneyStinson

14 Mar 2010, 13:31

2

5

4,065

by: karan12345

02 Jun 2020, 00:05

ER

Is m^n a perfect square?

Poor Quality

Poor Quality hide tags

barryseal

01 Dec 2018, 06:24

5

15

1,832

by: barryseal

03 Dec 2018, 00:11

ER

List A contains 16 distinct odd integers and 9 distinct even integers

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

baru

15 Jul 2019, 10:18

8

7

2,460

by: bumpbot

07 Sep 2024, 04:16

ER

If B is a set of real numbers, is there a number in B that

655-705 (Hard) | Statistics and Sets Problems

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

battleprof

23 Apr 2013, 09:46

10

17

8,665

by: bumpbot

23 Dec 2024, 06:29

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

If vertices of a triangle are A (5, 0), B (x, y) and C (25, 0), what

555-605 (Medium) | Coordinate Plane, Geometry

555-605 (Medium) | Coordinate Plane, Geometry hide tags

bb

11 Oct 2021, 03:50

45

7

16,050

by: bumpbot

26 Aug 2025, 23:56

ER

The sale price of a certain jacket was 15 percent less than its origin

505-555 (Easy) | Percent and Interest Problems, Word Problems

505-555 (Easy) | Percent and Interest Problems, Word Problems hide tags

bbhawini

20 Sep 2017, 23:54

18

3

10,393

by: bumpbot

05 Apr 2026, 16:21

ER

If n and p are positive integers, is 10^n - 1 divisible by p ?

555-605 (Medium) | Multiples and Factors

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

bblast

08 May 2023, 08:31

9

1

9,440

by: Bunuel

08 May 2023, 08:32

ER

If the three-digit integer x=”abc”, where a, b, and c

555-605 (Medium) | Fractions and Ratios

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

BDSunDevil

04 May 2012, 07:21

63

9

13,452

by: bumpbot

25 Jan 2025, 03:36

ER

A museum sold 30 tickets on Saturday. Some of the tickets

655-705 (Hard) | Inequalities, Word Problems

655-705 (Hard) | Inequalities, Word Problems hide tags

BDSunDevil

11 Jun 2012, 08:14

31

12

12,144

by: bumpbot

30 Nov 2024, 23:06

ER

If x and y are positive integers and 1 + x + y +xy = 21

605-655 (Medium) | Algebra

605-655 (Medium) | Algebra hide tags

BDSunDevil

11 Jun 2012, 08:20

42

10

14,288

by: bumpbot

23 Nov 2023, 14:48

ER

Is xy= -1? (1) x=y (2) y=1

505-555 (Easy) | Algebra

505-555 (Easy) | Algebra hide tags

BDSunDevil

22 May 2012, 10:50

11

3

5,788

by: bumpbot

13 Jul 2023, 14:21

ER

What is the numerical value of 1/a + 1/b + 1/c ?

655-705 (Hard) | Algebra

655-705 (Hard) | Algebra hide tags

BeavisMan

03 Sep 2010, 19:18

18

13

33,990

by: bumpbot

21 Nov 2024, 06:26

ER

If k is a positive integer and the tens digit of k+5 is 4

605-655 (Medium) | Fractions and Ratios, Number Properties

605-655 (Medium) | Fractions and Ratios, Number Properties hide tags

bekbek

27 Jul 2015, 08:48

117

4

25,722

by: bumpbot

25 Apr 2025, 11:35

ER

If x and y are positive integers, is x a prime number?

805+ (Hard) | Absolute Values +2 tags

805+ (Hard) | Absolute Values, Algebra, Inequalities hide tags

bekerman

22 May 2014, 17:42

179

18

23,330

by: bumpbot

30 Jul 2025, 09:14