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

179

15

80,034

by: thisisakr

16 Apr 2026, 11:46

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100 Hardest and easiest questions for DS as of April 2026

1, 2

Bunuel

01 Jan 2026, 05:45

858

24

189,052

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

488,795

by: bb

29 Aug 2025, 13:27

ER

What is the units digit of a positive integer n?

605-655 (Medium) | Number Properties

605-655 (Medium) | Number Properties hide tags

MathRevolution

08 Jun 2017, 00:54

4

6

2,909

by: EthanTheTutor

21 Aug 2025, 19:57

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Is k greater than 3?

605-655 (Medium) | Inequalities

605-655 (Medium) | Inequalities hide tags

tonebeeze

08 Oct 2010, 18:55

50

10

11,561

by: bumpbot

21 Aug 2025, 16:14

ER

Is the product st negative?

605-655 (Medium) | Inequalities

605-655 (Medium) | Inequalities hide tags

gmat6nplus1

03 Dec 2013, 03:33

46

14

11,011

by: bumpbot

21 Aug 2025, 16:10

ER

If a is an integer and a=|b|/b is a=1

605-655 (Medium) | Absolute Values, Inequalities

605-655 (Medium) | Absolute Values, Inequalities hide tags

rxs0005

18 Feb 2012, 05:04

45

14

9,813

by: bumpbot

21 Aug 2025, 16:05

ER

Is x + x^2 + ... +x^10 positive?

605-655 (Medium) | Exponents +2 tags

605-655 (Medium) | Exponents, Inequalities, Number Properties hide tags

gmatpapa

02 Jan 2011, 02:34

39

2

9,270

by: bumpbot

21 Aug 2025, 15:54

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If n is not equal to 0, is |n| < 4 ? (1) n^2 > 16 (2)

605-655 (Medium) | Absolute Values, Inequalities

605-655 (Medium) | Absolute Values, Inequalities hide tags

hogann

13 Oct 2009, 09:17

38

13

8,622

by: bumpbot

21 Aug 2025, 15:54

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Is n(n+1)(n+2) divisible by 24?

605-655 (Medium) | Multiples and Factors, Number Properties

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

PrepTap

07 May 2015, 00:08

64

10

17,644

by: bumpbot

21 Aug 2025, 12:08

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Is the square root of (x - 5)^2 = 5 - x ? (1) -x|x| > 0 (2) 5 - x > 0

605-655 (Medium) | Absolute Values, Inequalities

605-655 (Medium) | Absolute Values, Inequalities hide tags

1, 2

jjhko

13 Jan 2007, 11:52

335

21

53,923

by: bumpbot

21 Aug 2025, 12:08

ER

Two points, N and Q (not shown), lie to the right of point M on line l

605-655 (Medium) | Fractions and Ratios

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

1, 2

Bunuel

20 Aug 2025, 23:54

302

20

51,441

by: Shreyaarora

20 Aug 2025, 23:35

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At the elite university, 500 students study Computer Science or Electr

605-655 (Medium) | Overlapping Sets

605-655 (Medium) | Overlapping Sets hide tags

Bunuel

11 Apr 2023, 01:30

7

4

2,010

by: bumpbot

20 Aug 2025, 13:10

ER

If x is a positive integer greater than 1, is x! + x + 1 a p

605-655 (Medium) | Number Properties

605-655 (Medium) | Number Properties hide tags

goodyear2013

08 Jul 2014, 07:07

60

12

22,074

by: bumpbot

20 Aug 2025, 10:21

ER

If the average (arithmetic mean) of four different numbers is 30, how

605-655 (Medium) | Statistics and Sets Problems

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

kook44

06 Jun 2019, 02:45

209

14

78,362

by: bumpbot

19 Aug 2025, 22:29

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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

490

37

76,152

by: bumpbot

19 Aug 2025, 20:58

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If x is a non-zero integer (40 + 24)/x is an integer?

605-655 (Medium) | Multiples and Factors

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

Bunuel

29 Oct 2015, 01:23

10

9

3,793

by: bumpbot

19 Aug 2025, 17:47

ER

What is the ratio of x:y:z?

605-655 (Medium) | Fractions and Ratios

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

lumone

27 Nov 2007, 08:17

113

18

25,877

by: bumpbot

19 Aug 2025, 12:05

ER

If x is an integer, is x between 27 and 54?

605-655 (Medium) | Remainders

605-655 (Medium) | Remainders hide tags

Bunuel

13 Nov 2019, 00:54

16

14

4,354

by: bumpbot

18 Aug 2025, 22:05

ER

If K is a positive integer less than 10 and N = 4,321 + K, what is the

605-655 (Medium) | Multiples and Factors

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

Bunuel

09 Dec 2014, 07:38

164

12

30,672

by: bumpbot

18 Aug 2025, 13:40

ER

If m is a two-digit number, what is the remainder when m is divided by

605-655 (Medium) | Multiples and Factors

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

Bunuel

20 Jan 2023, 02:30

9

7

2,417

by: bumpbot

18 Aug 2025, 12:00

ER

[x] denotes the greatest integer less than or equal to x.

605-655 (Medium) | Arithmetic, Functions and Custom Characters

605-655 (Medium) | Arithmetic, Functions and Custom Characters hide tags

fozzzy

22 Jun 2013, 00:26

101

5

17,399

by: bumpbot

17 Aug 2025, 06:03

ER

If a and b are consecutive even integers, is a > b?

605-655 (Medium) | Number Properties

605-655 (Medium) | Number Properties hide tags

Bunuel

21 Aug 2017, 06:02

8

7

6,523

by: bumpbot

15 Aug 2025, 21:42

ER

A nursery has 30 trees, carrying only pines, oaks, and maples. How man

605-655 (Medium) | Fractions and Ratios

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

Bunuel

29 Sep 2015, 05:22

31

7

6,732

by: bumpbot

15 Aug 2025, 20:15

What was the greatest difference between the high and low

605-655 (Medium) | Statistics and Sets Problems

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

ezinis

09 Nov 2009, 19:01

23

14

7,805

by: bumpbot

15 Aug 2025, 06:06

ER

If ab ≠ 0; is a/b > 0 ? (1) |a*b| = a*b (2) |a| + |b| = |a + b |

605-655 (Medium) | Absolute Values, Inequalities

605-655 (Medium) | Absolute Values, Inequalities hide tags

contactakanksha

03 Mar 2020, 05:37

10

5

3,483

by: Bunuel

14 Aug 2025, 06:41

ER

If line k in the xy-plane has equation y = mx + b, where m and b are

605-655 (Medium) | Coordinate Plane

605-655 (Medium) | Coordinate Plane hide tags

udaymathapati

02 Sep 2010, 12:52

172

9

40,290

by: bumpbot

13 Aug 2025, 11:18

ER

The probability that event A occurs is 0.4 and the probability that

605-655 (Medium) | Probability

605-655 (Medium) | Probability hide tags

MathRevolution

16 Sep 2017, 07:32

34

13

9,321

by: bumpbot

13 Aug 2025, 01:46

ER

Bea owns how many more CDs than Al owns?

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Bunuel

25 Mar 2015, 04:29

12

10

9,665

by: bumpbot

10 Aug 2025, 12:47

ER

A certain school has 250 students. All these students took a psychomet

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Raxit85

11 Feb 2020, 00:04

12

5

4,997

by: vektr

10 Aug 2025, 12:31

ER

Set S contains exactly four distinct positive integers. Is t

605-655 (Medium) | Statistics and Sets Problems

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

daviesj

07 Jan 2013, 10:30

29

7

9,864

by: bumpbot

09 Aug 2025, 21:35

ER

Team A and Team B have the same numbers of players on them.

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

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

MartyMurray

07 Mar 2026, 09:19

11

1

1,605

by: gmatophobia

09 Aug 2025, 14:09

ER

Did David solve more questions than Steve in a 2-hour test?

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Bunuel

25 May 2022, 08:30

1

2

3,033

by: bumpbot

09 Aug 2025, 07:12

ER

Mary, working at a steady rate, can perform a task in m hours. Nadir

605-655 (Medium) | Work and Rate Problems

605-655 (Medium) | Work and Rate Problems hide tags

Bunuel

11 Mar 2020, 03:40

68

8

10,137

by: SamCodes

08 Aug 2025, 07:37

ER

If x is negative, is x < –3 ? (1) x^2 > 9 (2) x^3 < –9

605-655 (Medium) | Inequalities

605-655 (Medium) | Inequalities hide tags

surendar26

02 Jul 2021, 02:15

451

13

68,033

by: bumpbot

07 Aug 2025, 08:07

ER

Set A consists of 8 distinct prime numbers. If x is equal to the range

605-655 (Medium) | Statistics and Sets Problems

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

Bunuel

11 Aug 2021, 03:30

28

7

10,209

by: bumpbot

06 Aug 2025, 04:22

ER

If √(xy) = xy, what is the value of x + y?

605-655 (Medium) | Algebra

605-655 (Medium) | Algebra hide tags

prakash111687

11 Jul 2012, 14:05

74

11

18,180

by: bumpbot

04 Aug 2025, 06:55

ER

A certain automobile dealer has 80 luxury cars in its inventory. Of th

605-655 (Medium) | Overlapping Sets

605-655 (Medium) | Overlapping Sets hide tags

Bunuel

25 Apr 2024, 01:30

10

3

1,747

by: bumpbot

03 Aug 2025, 22:54

ER

If the least common multiple of integers x and y is 840,

605-655 (Medium) | Arithmetic, Number Properties

605-655 (Medium) | Arithmetic, Number Properties hide tags

1, 2

rxs0005

03 Dec 2010, 18:09

81

24

22,290

by: bumpbot

03 Aug 2025, 18:52

ER

An auto dealer sells each car at either $20,000 or $30,000. Some cars

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

EgmatQuantExpert

10 May 2026, 04:24

17

10

5,445

by: bumpbot

03 Aug 2025, 03:12

ER

Juana mailed at least one letter on each day last week. Was the total

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Bunuel

07 Aug 2023, 10:00

135

16

27,051

by: agnivakolay

02 Aug 2025, 13:16

ER

Is x = |y - z|? (1) x = y - z (2) y > z

605-655 (Medium) | Absolute Values

605-655 (Medium) | Absolute Values hide tags

rxs0005

21 Sep 2010, 07:23

19

12

6,922

by: bumpbot

30 Jul 2025, 09:03

ER

Is x^y > 0 ? (1) y = 2 (2) x is an integer

605-655 (Medium) | Inequalities, Number Properties

605-655 (Medium) | Inequalities, Number Properties hide tags

Bunuel

23 Sep 2015, 03:36

38

9

7,642

by: bumpbot

29 Jul 2025, 23:30

ER

There are two solutions, A and B of spirit and water. The ratio of spi

605-655 (Medium) | Mixture Problems

605-655 (Medium) | Mixture Problems hide tags

Bunuel

28 Sep 2021, 01:30

27

5

6,649

by: Samiksha2610

29 Jul 2025, 06:47

ER

Is |xy| > xy? (1) (x^2y^2)^(1/2) = xy (2) |x| + |y| = x + y

605-655 (Medium) | Absolute Values, Inequalities

605-655 (Medium) | Absolute Values, Inequalities hide tags

Bunuel

13 Sep 2017, 21:48

38

16

7,176

by: bumpbot

29 Jul 2025, 02:43

ER

If x and y are integers and xy does not equal 0, is xy < 0?

605-655 (Medium) | Algebra, Inequalities

605-655 (Medium) | Algebra, Inequalities hide tags

Bunuel

19 Dec 2019, 04:07

17

5

14,684

by: bumpbot

29 Jul 2025, 01:38

ER

On a particular tour at the zoo, the ratio of the number of men to the

605-655 (Medium) | Fractions and Ratios, Word Problems

605-655 (Medium) | Fractions and Ratios, Word Problems hide tags

Bunuel

24 Apr 2025, 00:30

4

1,166

by: agrasan

28 Jul 2025, 22:17

ER

Each of the letters in the table above represents one of the numbers 1

605-655 (Medium) | Graphs and Illustrations, Number Properties

605-655 (Medium) | Graphs and Illustrations, Number Properties hide tags

GMATBusters

15 Dec 2018, 10:26

19

9

6,739

by: bumpbot

28 Jul 2025, 13:34

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

4,175

by: bumpbot

28 Jul 2025, 11:00

ER

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

119

11

13,863

by: bumpbot

28 Jul 2025, 10:57

ER

A marzipan factory has two machines producing marzipan. Every day, the

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Bunuel

23 Jan 2023, 02:30

4

2

1,360

by: bumpbot

28 Jul 2025, 09:43

ER

Each of the 8 numbers s, t, u, v, w, x, y and z is positive. Is the av

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Bunuel

07 May 2015, 03:20

6

3

5,002

by: bumpbot

28 Jul 2025, 07:44

ER

If N is a positive integer

605-655 (Medium) | Multiples and Factors, Number Properties

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

EgmatQuantExpert

13 Aug 2018, 02:27

31

10

7,161

by: bumpbot

26 Jul 2025, 00:16