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

179

15

79,567

by: thisisakr

16 Apr 2026, 11:46

ER

100 Hardest and easiest questions for DS as of April 2026

1, 2

Bunuel

01 Jan 2026, 05:45

858

24

188,959

by: bumpbot

16 Sep 2025, 06:05

ER

DS Question Directory by Topic and Difficulty

bb

29 Aug 2025, 13:27

1.5k

0

488,639

by: bb

29 Aug 2025, 13:27

If a, b, c, d are four integers such that a < b < c < d, Is d-c = c-b

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

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

amanvermagmat

28 Jun 2018, 11:41

7

3

2,622

by: bumpbot

17 May 2026, 04:00

ER

If x is a positive integer, is x<16?

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

shapla

12 Jan 2016, 09:34

39

11

21,432

by: Bunuel

15 May 2026, 07:50

ER

If x is a positive integer, then is x prime? (1) 3x + 1 is prime

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

Bunuel

11 Mar 2026, 11:02

411

15

64,463

by: Saurav1408

04 May 2026, 08:19

ER

A function f(x) is defined as f(x) = x + x2 for an integer x. If a is

805+ (Hard) | Functions and Custom Characters, Number Properties

805+ (Hard) | Functions and Custom Characters, Number Properties hide tags

Bunuel

03 Jun 2020, 23:02

15

5

3,251

by: bumpbot

02 May 2026, 02:16

ER

If x_n = a^{(2n-1)}, where n is a positive integer then find sum of th

805+ (Hard) | Functions and Custom Characters +2 tags

805+ (Hard) | Functions and Custom Characters, Number Properties, Sequences hide tags

GMATinsight

27 May 2021, 08:45

5

3

1,642

by: bumpbot

30 Apr 2026, 02:18

ER

For each positive integer k, let ak = (1 + 1/(k+1)). Is the product a1

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

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

gmatt1476

21 Sep 2019, 15:20

194

13

27,666

by: bumpbot

23 Apr 2026, 15:12

ER

If S is a sequence of numbers of the form X, XX, XXX, XXXX, XXXXX, …,

605-655 (Medium) | Multiples and Factors +2 tags

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

Bunuel

27 Jan 2016, 03:14

26

10

9,481

by: bumpbot

18 Apr 2026, 08:29

ER

Set X consists of exactly four distinct integers that are greater than

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

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

Sajjad1994

29 Oct 2020, 12:02

16

4

3,255

by: bumpbot

17 Apr 2026, 00:52

ER

Set X consists of different positive numbers arranged in ascending ord

555-605 (Medium) | Number Properties, Word Problems

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

enigma123

17 Nov 2011, 16:41

57

9

26,297

by: bumpbot

16 Apr 2026, 11:27

ER

There is a sequence, 4(10^n), 4(10^(n-1)), ..., 4(10^(n-m)), for posit

805+ (Hard) | Number Properties, Sequences

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

Bunuel

20 Dec 2015, 06:37

69

12

13,748

by: bumpbot

15 Apr 2026, 06:06

ER

For integers a, b, and c, a/(b-c) = 1. What is the value of (b-c)/b?

505-555 (Easy) | Algebra +2 tags

505-555 (Easy) | Algebra, Multiples and Factors, Number Properties hide tags

Bunuel

06 Oct 2017, 05:30

33

5

16,332

by: esseeligendi

13 Apr 2026, 19:37

ER

In the two-digit integers 3[m]\Box[/m] and 2[m]\bigtriangleup[/m],The

655-705 (Hard) | Arithmetic +2 tags

655-705 (Hard) | Arithmetic, Functions and Custom Characters, Number Properties hide tags

1, 2

AbdurRakib

22 Jun 2017, 14:44

623

22

57,124

by: bumpbot

07 Apr 2026, 12:44

ER

If p and q are positive integers, can the fraction p/q be expressed as

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

Bunuel

23 May 2022, 09:09

6

3

1,918

by: Bunuel

04 Apr 2026, 23:38

ER

If c and d are positives integers, d >= 2 and c*d is the square of a

705-805 (Hard) | Min-Max Problems, Number Properties

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

Bunuel

19 Feb 2020, 03:35

14

4

4,871

by: Gmat860sanskar

03 Apr 2026, 11:18

ER

Is k odd? (1) 6k is an even number (2) 7k is an odd number

805+ (Hard) | Non-Math Related, Number Properties

805+ (Hard) | Non-Math Related, Number Properties hide tags

GMATBusters

30 Apr 2020, 22:33

40

6

4,639

by: bumpbot

11 Mar 2026, 19:29

If m and n are positive integers and mn = k, is m + n = k + 1?

555-605 (Medium) | Algebra, Number Properties

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

carbazzy

07 Aug 2019, 15:34

66

8

18,589

by: totaltestprepNick

11 Mar 2026, 10:59

ER

What is the greatest common divisor of positive integers m and n ?

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

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

1, 2

lahoosaher

06 Jun 2019, 08:23

412

20

91,744

by: totaltestprepNick

11 Mar 2026, 10:09

ER

If p is a positive integer, is 2^p + 1 a prime number?

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

Bunuel

07 Apr 2017, 23:43

47

11

21,338

by: totaltestprepNick

11 Mar 2026, 09:42

ER

Is the integer n a prime number?

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

AbdurRakib

01 Jul 2016, 05:05

66

6

26,255

by: totaltestprepNick

11 Mar 2026, 09:17

ER

Set A contains infinite number of integers. Are all the integers in Se

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

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

GMATBusters

13 Oct 2018, 10:39

8

11

2,436

by: Shwetabh54

06 Mar 2026, 05:55

ER

In the correctly worked addition problem above, A, B, C, D

805+ (Hard) | Arithmetic, Number Properties

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

1, 2

Carcass

12 Mar 2012, 07:56

417

25

61,141

by: Adit_

05 Mar 2026, 03:29

ER

How many integers n are there such that r < n < s ?

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

Bunuel

29 Sep 2010, 07:05

301

18

42,345

by: totaltestprepNick

04 Mar 2026, 11:35

ER

If m and n are consecutive positive integers, is m greater than n ?

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

Bunuel

12 Feb 2014, 02:04

89

15

24,927

by: totaltestprepNick

04 Mar 2026, 11:34

ER

How many integers are there between, but not including, integers r and

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

1, 2

Bunuel

15 Oct 2012, 04:51

73

27

32,095

by: totaltestprepNick

04 Mar 2026, 11:31

ER

If x, y, and z are three integers, are they consecutive integers?

Sub 505 (Easy) | Number Properties

Sub 505 (Easy) | Number Properties hide tags

Bunuel

03 Jan 2014, 06:21

28

7

19,634

by: totaltestprepNick

04 Mar 2026, 11:30

ER

If n is an integer between 2 and 100 and if n is also the square of an

605-655 (Medium) | Algebra, Number Properties

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

Bunuel

23 Feb 2014, 07:51

161

11

36,831

by: totaltestprepNick

23 Feb 2026, 16:12

ER

Is the integer x a 3-digit integer? (1) x is the square of an integer

Sub 505 (Easy) | Number Properties

Sub 505 (Easy) | Number Properties hide tags

Bunuel

26 Apr 2019, 01:58

43

12

20,689

by: totaltestprepNick

23 Feb 2026, 16:08

ER

The sum of positive integers x and y is 77. What is value of xy?

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

andrewnorway

01 May 2019, 03:31

134

15

51,447

by: totaltestprepNick

23 Feb 2026, 13:52

ER

If Q is an integer between 10 and 100, what is the value of

Sub 505 (Easy) | Number Properties

Sub 505 (Easy) | Number Properties hide tags

Bunuel

17 Jan 2014, 02:33

26

6

16,087

by: totaltestprepNick

23 Feb 2026, 13:49

ER

If m is an integer, is m odd?

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

1, 2, 3

sudhagar

06 Nov 2005, 13:00

221

41

55,694

by: totaltestprepNick

23 Feb 2026, 13:46

ER

If x and y are integers, is x an even integer?

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

anilnandyala

09 Jan 2011, 08:45

52

5

19,596

by: totaltestprepNick

23 Feb 2026, 13:45

ER

Is the positive integer n odd?

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

AbdurRakib

01 Jul 2016, 05:28

97

14

25,142

by: totaltestprepNick

23 Feb 2026, 13:42

ER

Is the integer p even? (1) The integer p^2 + 1 is odd. (2) The integer

Sub 505 (Easy) | Number Properties

Sub 505 (Easy) | Number Properties hide tags

Bunuel

02 Aug 2018, 04:59

13

15,418

by: totaltestprepNick

23 Feb 2026, 13:41

ER

If i and j are integers, is i + j an even integer?

Sub 505 (Easy) | Number Properties

Sub 505 (Easy) | Number Properties hide tags

Bunuel

06 Aug 2012, 03:13

34

11

22,032

by: totaltestprepNick

23 Feb 2026, 13:40

ER

If r, s, and t are nonzero integers, is r^5*s^3*t^4 negative

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

Bunuel

07 Jan 2014, 05:20

62

8

25,851

by: totaltestprepNick

23 Feb 2026, 13:15

ER

Does the integer k have at least three different positive prime factor

505-555 (Easy) | Multiples and Factors, Number Properties

505-555 (Easy) | Multiples and Factors, Number Properties hide tags

Bunuel

09 Jul 2012, 04:51

45

17

33,649

by: totaltestprepNick

23 Feb 2026, 13:06

ER

What is the value of the integer p ?

Sub 505 (Easy) | Multiples and Factors, Number Properties

Sub 505 (Easy) | Multiples and Factors, Number Properties hide tags

Bunuel

14 Jun 2012, 03:04

62

15

51,275

by: totaltestprepNick

23 Feb 2026, 13:04

ER

If x and y are positive integers, what is the value of xy?

Sub 505 (Easy) | Multiples and Factors, Number Properties

Sub 505 (Easy) | Multiples and Factors, Number Properties hide tags

ctgmat123

30 Jun 2012, 05:29

319

19

110,897

by: totaltestprepNick

23 Feb 2026, 12:55

ER

If J, K, L, M, and N and positive integers in ascending order, what is

Sub 505 (Easy) | Number Properties

Sub 505 (Easy) | Number Properties hide tags

GMATBusters

18 Nov 2018, 09:50

10

12

11,600

by: Bunuel

16 Feb 2026, 22:06

ER

Devil's Dozen!!!

605-655 (Medium) | Algebra +9 tags

605-655 (Medium) | Algebra, Combinations, Distance and Speed Problems, Multiples and Factors, Number Properties, Overlapping Sets, Percent and Interest Problems, Remainders, Statistics and Sets Problems, Word Problems hide tags

1, 2, 3, 4

Bunuel

19 Mar 2012, 06:54

1.3k

78

175,125

by: bumpbot

01 Feb 2026, 23:35

ER

There are 10 books lying on a table. Is the proba

655-705 (Hard) | Min-Max Problems, Number Properties

655-705 (Hard) | Min-Max Problems, Number Properties hide tags

1, 2

chetan2u

24 Jan 2017, 06:08

34

20

8,113

by: bumpbot

27 Jan 2026, 13:19

ER

If (3k)^x = 1, what is the value of k ? (1) k> 0 (2) x is a positive

705-805 (Hard) | Exponents, Number Properties

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

Bunuel

19 Sep 2019, 21:25

18

13

3,079

by: bumpbot

26 Jan 2026, 13:41

ER

If a is a positive integer less than 3 and b is a positive integer les

805+ (Hard) | Fractions and Ratios, Number Properties

805+ (Hard) | Fractions and Ratios, Number Properties hide tags

Bunuel

08 Jan 2021, 01:15

15

7

2,665

by: bumpbot

26 Jan 2026, 09:20

ER

Set n is a finite set of integers. Are there any even numbers included

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

Bunuel

21 Apr 2016, 00:38

4

2,714

by: bumpbot

26 Jan 2026, 08:46

ER

12 Days of Christmas GMAT Competition - Day 4: If x and y are prime

805+ (Hard) | Exponents, Number Properties

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

Bunuel

17 Dec 2022, 07:00

17

7

4,454

by: bumpbot

26 Jan 2026, 04:44

ER

Is integer x square of an integer? 1) Sum of all the factors of x is

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

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

GMATinsight

26 Feb 2019, 06:07

5

6

1,612

by: bumpbot

23 Jan 2026, 23:00

ER

If a, b, c and n are positive integers and m = a^4*b^3*c^n, how many

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

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

Bunuel

13 Jun 2023, 08:00

14

5

1,992

by: bumpbot

22 Jan 2026, 13:09

ER

Is x an integer? (1) x^2 is an integer. (2) x/2 is not an integer.

605-655 (Medium) | Number Properties

605-655 (Medium) | Number Properties hide tags

gmatt1476

21 Sep 2019, 20:16

75

7

18,025

by: bumpbot

20 Jan 2026, 12:08

ER

What is the value of xy?

805+ (Hard) | Exponents, Number Properties

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

swati007

06 Mar 2014, 00:03

49

10

10,331

by: bumpbot

20 Jan 2026, 02:01

ER

what is the value of xy? 1) y is the smallest prime number.

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

GMATBusters

20 Nov 2018, 08:59

10

2,329

by: bumpbot

20 Jan 2026, 01:55