Data Sufficiency (DS)

02 Oct 2025, 01:36

7!! ER

100 Hardest and easiest questions for DS as of October 2025

1, 2

Bunuel

21 Aug 2015, 03:42

842

24

183,714

16 Sep 2025, 06:05

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DS Question Directory by Topic and Difficulty

bb

07 Mar 2012, 08:58

1,506

0

480,566

by: bb

07 Mar 2012, 08:58

7!! ER

What is the product of positive integers r and s ?

555-605 Level | Algebra

555-605 Level | Algebra hide tags

ritumaheshwari02

29 Nov 2012, 10:18

2

2,929

29 Mar 2017, 05:56

7!! ER

If R & S are consecutive Odd integers, then is R>S?

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

tirupatibalaji

09 Jan 2011, 06:23

3

2

2,895

29 Mar 2017, 06:08

7!! ER

Each of a, b, and c is positive. Does b = root(ac)

505-555 Level | Algebra

505-555 Level | Algebra hide tags

reliablevish

29 Aug 2013, 13:51

1

2

3,578

29 Mar 2017, 06:10

7!! ER

How many parking spaces are occupied in a certain parking lo

505-555 Level | Word Problems

505-555 Level | Word Problems hide tags

fozzzy

11 Sep 2013, 06:22

3

2

2,987

29 Mar 2017, 06:12

7!! ER

Is x > 7?

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

ankur1901

11 Jan 2014, 00:11

2

2,222

29 Mar 2017, 06:13

7!! ER

If y is an integer, is y odd?

Sub 505 Level | Number Properties

Sub 505 Level | Number Properties hide tags

vibrant

27 May 2014, 06:56

1

2

3,549

29 Mar 2017, 06:23

7!! ER

What is the value of x?

555-605 Level | Algebra, Exponents

555-605 Level | Algebra, Exponents hide tags

Reni

26 Jul 2014, 10:03

3

2

2,387

29 Mar 2017, 06:24

7!!

Tom started a company with 5 of his friends from the college. They mad

655-705 Level | Statistics and Sets Problems

655-705 Level | Statistics and Sets Problems hide tags

BillyZ

28 Mar 2017, 15:48

2

3

2,605

by: BillyZ

29 Mar 2017, 22:11

7!! ER

Is a positive?

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

Bunuel

09 Mar 2016, 12:51

3

3,346

by: Mo2men

30 Mar 2017, 04:56

7!! ER

What is the value of x?

555-605 Level | Algebra

555-605 Level | Algebra hide tags

harish1986

14 Oct 2015, 10:22

10

8

2,850

by: origen87

30 Mar 2017, 10:32

7!! ER

Is z > y ? (1) xz > xy (2) x is negative

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

rxs0005

07 Feb 2012, 16:00

2

2,730

by: AkshdeepS

30 Mar 2017, 10:59

7!! ER

How many of the three heights of triangle ABC do not pass inside the

605-655 Level | Geometry

605-655 Level | Geometry hide tags

Bunuel

30 Mar 2017, 08:18

5

1,488

by: Kurtosis

03 Apr 2017, 23:32

7!!

There is a company X that does not elect employees who are under 20 ye

Poor Quality

Poor Quality hide tags

BillyZ

09 Mar 2017, 22:38

10

7

3,016

by: bobby200

04 Apr 2017, 07:26

7!! ER

If 3x + 2y + 5 = 2 – 6y, what is y?

Sub 505 Level | Algebra

Sub 505 Level | Algebra hide tags

Bunuel

04 Apr 2017, 00:23

2

1,618

by: matthewsmith_89

04 Apr 2017, 13:42

7!! ER

What is the value of x? (1) x – y = y – x (2) x + y = –x + y

505-555 Level | Algebra

505-555 Level | Algebra hide tags

Bunuel

04 Apr 2017, 00:25

2

1,346

by: matthewsmith_89

04 Apr 2017, 13:47

7!! ER

If Y is an integer, is Y/4 an integer?

555-605 Level | Multiples and Factors, Number Properties

555-605 Level | Multiples and Factors, Number Properties hide tags

Bunuel

04 Apr 2017, 05:46

2

3

1,745

by: matthewsmith_89

05 Apr 2017, 09:29

7!! ER

If 1.8x + 2.7y = 12.6, what is the value of x?

555-605 Level | Algebra

555-605 Level | Algebra hide tags

Bunuel

04 Apr 2017, 00:22

3

1,613

by: shekyonline

05 Apr 2017, 09:47

7!! ER

What is value of x?

555-605 Level | Algebra

555-605 Level | Algebra hide tags

sanjoo

29 Jun 2012, 09:00

2

5

3,734

06 Apr 2017, 01:41

7!! ER

In the diagram above each of the letters represents one of the digits

605-655 Level | Arithmetic

605-655 Level | Arithmetic hide tags

Bunuel

06 Apr 2017, 01:46

2

3

2,865

by: Kurtosis

06 Apr 2017, 20:02

7!! ER

In the xy-plane, what is the x-intercept of a certain line?

555-605 Level | Coordinate Plane

555-605 Level | Coordinate Plane hide tags

shakticnb

31 Aug 2015, 04:46

14

5

5,063

10 Apr 2017, 03:49

7!! ER

If r is a prime number and s is a positive integer, is

705-805 Level | Number Properties

705-805 Level | Number Properties hide tags

naumyuk

20 Jan 2016, 00:15

5

4

2,292

10 Apr 2017, 05:10

7!! ER

In the diagram above each of the letters represents one of the digits

705-805 Level | Arithmetic

705-805 Level | Arithmetic hide tags

Bunuel

10 Apr 2017, 02:31

2

1,850

by: dg88074

10 Apr 2017, 23:05

7!! ER

Is |ab| > -ab?

655-705 Level | Absolute Values, Inequalities

655-705 Level | Absolute Values, Inequalities hide tags

SleeB

27 Oct 2013, 15:46

19

13

3,783

by: askul2389

11 Apr 2017, 08:00

7!!

If m and n are positive integers, is (mn+1+3)(mn+2+4)(mn+3+5) divisibl

Poor Quality

Poor Quality hide tags

BillyZ

29 Mar 2017, 22:16

7

4

3,046

by: shekyonline

12 Apr 2017, 09:46

7!! ER

If xy = 10, what is the value of x + y?

Sub 505 Level | Algebra

Sub 505 Level | Algebra hide tags

Sajjad1994

12 Apr 2017, 13:22

10

4

7,278

by: BrentGMATPrepNow

13 Apr 2017, 06:13

7!! ER

If n is an integer, is n^3 divisible by 54?

655-705 Level | Multiples and Factors

655-705 Level | Multiples and Factors hide tags

Bunuel

09 Mar 2016, 12:48

2

5

2,540

by: chesstitans

16 Apr 2017, 12:18

7!!

|x-a| < |x-b|. Is a<b?

655-705 Level | Absolute Values, Inequalities

655-705 Level | Absolute Values, Inequalities hide tags

PrepTap

08 May 2015, 12:41

13

4,888

by: nks2611

17 Apr 2017, 05:07

7!! ER

Is x < y ? (1) The ratio of x to y is 7/9. (2) xy > 0

555-605 Level | Fractions and Ratios, Inequalities

555-605 Level | Fractions and Ratios, Inequalities hide tags

Naina1605

12 Feb 2012, 12:18

18

6

13,321

by: mvictor

18 Apr 2017, 13:16

7!! ER

What is the value of x^3 − y^3?

Sub 505 Level | Algebra

Sub 505 Level | Algebra hide tags

Bunuel

19 Apr 2017, 07:56

2

1,779

by: rohit8865

19 Apr 2017, 08:28

7!! ER

If n is a member of the set {10, 15, 20, 25, 30, 35, 40}, what is the

Sub 505 Level | Multiples and Factors

Sub 505 Level | Multiples and Factors hide tags

Bunuel

20 Apr 2017, 01:23

4

1,895

by: mvictor

20 Apr 2017, 13:20

7!! ER

The average of x, y, and z is 40. What is x? (1) y = 2z (2) y + z = 75

Sub 505 Level | Algebra

Sub 505 Level | Algebra hide tags

Bunuel

21 Apr 2017, 00:05

1

1,321

21 Apr 2017, 00:52

7!! ER

If w = 3x − 4y^2, what is w?

Sub 505 Level | Algebra

Sub 505 Level | Algebra hide tags

Bunuel

21 Apr 2017, 00:04

1

2,128

21 Apr 2017, 00:58

7!! ER

Is p^2 an even integer?

Sub 505 Level | Number Properties

Sub 505 Level | Number Properties hide tags

Bunuel

20 Apr 2017, 23:50

1

2,082

21 Apr 2017, 01:09

7!! ER

If x, y, and z are positive integers with the ratio 2 : 4 : 6, what is

505-555 Level | Algebra, Fractions and Ratios

505-555 Level | Algebra, Fractions and Ratios hide tags

Bunuel

20 Apr 2017, 23:35

2

2,437

21 Apr 2017, 03:00

7!! ER

If l is the length of a rectangle and w is the width of the rectangle,

505-555 Level | Geometry

505-555 Level | Geometry hide tags

Bunuel

20 Apr 2017, 23:46

1

1,886

by: mohshu

21 Apr 2017, 03:36

7!! ER

In a rectangle, the length is l, the width is w, and the diagonal is d

505-555 Level | Geometry

505-555 Level | Geometry hide tags

Bunuel

20 Apr 2017, 23:52

1

1,732

by: mohshu

21 Apr 2017, 04:24

7!! ER

If n is a positive integer, is n + 1 a prime?

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

Bunuel

20 Apr 2017, 23:15

1

1,620

by: emockus

21 Apr 2017, 06:58

7!! ER

Is ab > 0?

605-655 Level | Inequalities

605-655 Level | Inequalities hide tags

banksy

15 Feb 2011, 13:09

7

4

5,181

22 Apr 2017, 09:28

7!! ER

To make the school racquetball team, Larry must win at least 75% of hi

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

06 Feb 2015, 07:34

3

6

4,002

23 Apr 2017, 03:38

7!! ER

n=9.94l6,what digit is l?

555-605 Level | Arithmetic, Fractions and Ratios

555-605 Level | Arithmetic, Fractions and Ratios hide tags

VyshakhR1995

26 Apr 2017, 01:38

4

1

2,212

26 Apr 2017, 01:40

7!! ER

If q is a positive integer, what is the value of q?

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

VyshakhR1995

26 Apr 2017, 01:01

1

2

2,011

by: BrentGMATPrepNow

26 Apr 2017, 06:22

7!! ER

What percent of x is y?

555-605 Level | Fractions and Ratios

555-605 Level | Fractions and Ratios hide tags

Bunuel

27 Apr 2017, 02:41

2

3

3,007

by: niks18

27 Apr 2017, 07:31

7!! ER

If x and z are positive integers and xz = 24 what is the ratio of x to

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

Bunuel

27 Apr 2017, 02:40

2

1,520

by: niks18

27 Apr 2017, 12:27

7!! ER

At least one of x, y, and z is 1?

Poor Quality

Poor Quality hide tags

MathRevolution

27 Apr 2017, 01:50

1

3

1,655

by: MathRevolution

30 Apr 2017, 18:07

7!! ER

Painters X and Y are simultaneously painting a house. If together the

505-555 Level | Work and Rate Problems

505-555 Level | Work and Rate Problems hide tags

Bunuel

28 Apr 2017, 03:30

13

4

8,547

by: SUPERSARS

03 May 2017, 03:39

7!!

If xy = -9, what is the value

605-655 Level | Algebra

605-655 Level | Algebra hide tags

ganand

05 May 2017, 06:49

4

2

1,988

by: niks18

05 May 2017, 21:15

7!!

Is x < 1?

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

ganand

06 May 2017, 05:09

2

3

2,113

by: WiziusCareers1

06 May 2017, 05:52

7!! ER

Is the slope of Line L positive?

505-555 Level | Coordinate Plane

505-555 Level | Coordinate Plane hide tags

GMATinsight

23 Jul 2015, 07:03

6

3

3,357

06 May 2017, 06:53

7!! ER

Is the average (arithmetic mean) of a, b, and c greater than 12?

Sub 505 Level | Statistics and Sets Problems

Sub 505 Level | Statistics and Sets Problems hide tags

Bunuel

03 May 2017, 04:43

2

3

2,012

by: er.arun88

06 May 2017, 10:44

7!! ER

Is the integer z divisible by 6?

605-655 Level | Number Properties

605-655 Level | Number Properties hide tags

stonecold

21 Aug 2016, 07:33

12

6

3,316