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

183,713

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

480,546

by: bb

07 Mar 2012, 08:58

7!! ER

If f(n)=4^n-3^n and n is a positive integer

605-655 Level | Algebra

605-655 Level | Algebra hide tags

harshdeep12

06 Jun 2017, 12:16

2

2,150

08 Jun 2017, 15:22

7!! ER

If the mean of the set S is 14 then find the Median of the set 1) Set

555-605 Level | Statistics and Sets Problems

555-605 Level | Statistics and Sets Problems hide tags

GMATinsight

10 Jun 2017, 04:34

1

1,245

by: pushpitkc

10 Jun 2017, 04:59

7!! ER

If the median of the set S is 15 then find the Range of the set 1) Se

605-655 Level | Statistics and Sets Problems

605-655 Level | Statistics and Sets Problems hide tags

GMATinsight

10 Jun 2017, 04:32

2

1

2,032

by: pushpitkc

10 Jun 2017, 05:29

7!! ER

Is a > 0?

655-705 Level | Number Properties

655-705 Level | Number Properties hide tags

chetan2u

21 Jan 2017, 07:44

6

3,410

by: chetan2u

10 Jun 2017, 20:08

7!! ER

If x, y are integers, is x+y an odd number?

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

MathRevolution

13 Jun 2017, 01:41

1

3

2,057

13 Jun 2017, 02:40

7!! ER

Is y!/x! an integer?

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BukrsGmat

13 Jul 2012, 02:01

7

10

7,388

by: akshayk

13 Jun 2017, 22:34

7!! ER

Is |x-1| < 1?

705-805 Level | Absolute Values, Inequalities

705-805 Level | Absolute Values, Inequalities hide tags

mokap25

17 Aug 2011, 05:36

10

5

4,041

13 Jun 2017, 23:08

7!! ER

If the sum of a, b, and c is less than five, is a less than one?

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

Bunuel

14 Jun 2017, 06:52

3

1,834

by: Mo2men

15 Jun 2017, 18:13

7!! ER

Is a the common divisor of b and c? 1) a < b < c 2) a, b, c are conse

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

GMATinsight

16 Jun 2017, 06:56

1

1,632

by: RMD007

16 Jun 2017, 07:59

7!! ER

A shopkeeper purchased two TV sets A and B at the same price

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bkpolymers1617

14 Jun 2017, 08:39

4

6

3,584

by: kkrrsshh

17 Jun 2017, 00:00

7!! ER

What is the value of x?

505-555 Level | Algebra

505-555 Level | Algebra hide tags

vikasp99

23 Feb 2017, 20:52

1

3

1,566

17 Jun 2017, 10:40

7!! ER

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

555-605 Level | Algebra, Inequalities

555-605 Level | Algebra, Inequalities hide tags

Bunuel

14 Jun 2017, 03:40

2

3

1,530

by: Chets25

17 Jun 2017, 16:10

7!! ER

If w + x < 0, is w - y > 0 ?

655-705 Level | Inequalities

655-705 Level | Inequalities hide tags

uzzy12

18 Aug 2010, 21:31

7

5

3,812

20 Jun 2017, 09:53

7!! ER

Is xy > 0? (1) x^2 > 0 (2) xy^2 > 0

Sub 505 Level | Inequalities

Sub 505 Level | Inequalities hide tags

Bunuel

28 Mar 2016, 02:29

1

5

2,926

by: amanvermagmat

21 Jun 2017, 21:32

7!! ER

If -x is a prime number, what is the value of x?

555-605 Level | Algebra, Number Properties

555-605 Level | Algebra, Number Properties hide tags

Bunuel

22 Jun 2017, 06:01

5

2,350

by: shashankism

22 Jun 2017, 06:17

7!! ER

If a ≠ 0, is a^b > 1?

555-605 Level | Exponents, Inequalities

555-605 Level | Exponents, Inequalities hide tags

Bunuel

22 Jun 2017, 04:57

5

2,264

by: arvind910619

22 Jun 2017, 11:03

7!! ER

If A, B and C are positive integers, what is the value of A?

555-605 Level | Fractions and Ratios, Number Properties

555-605 Level | Fractions and Ratios, Number Properties hide tags

chetan2u

05 Apr 2016, 07:55

4

3

2,152

22 Jun 2017, 11:51

7!! ER

Is 5^k greater than k?

555-605 Level | Exponents, Inequalities

555-605 Level | Exponents, Inequalities hide tags

Bunuel

24 Jun 2017, 08:33

7

2

2,614

25 Jun 2017, 15:23

7!! ER

Is y > 0?

505-555 Level | Inequalities

505-555 Level | Inequalities hide tags

Bunuel

24 Jun 2017, 00:13

5

7

2,945

26 Jun 2017, 00:23

7!! ER

If a and c are positive integers, is 3^11a × a^12c divisible by 2?

Sub 505 Level | Exponents, Multiples and Factors

Sub 505 Level | Exponents, Multiples and Factors hide tags

Bunuel

28 Apr 2016, 17:02

4

2,476

by: ashikaverma13

26 Jun 2017, 00:36

7!! ER

If r and s are positive integers, r/15 is an integer and s/12 is an in

555-605 Level | Multiples and Factors

555-605 Level | Multiples and Factors hide tags

Bunuel

28 Apr 2016, 04:56

1

2

2,383

by: ashikaverma13

26 Jun 2017, 00:50

7!! ER

Is the average (arithmetic mean) of a, b, and c equal to 8?

Sub 505 Level | Statistics and Sets Problems

Sub 505 Level | Statistics and Sets Problems hide tags

Bunuel

25 Jun 2017, 02:55

1

3

10,441

26 Jun 2017, 13:35

7!! ER

If A and B are two positive single digit number,

655-705 Level | Algebra

655-705 Level | Algebra hide tags

chetan2u

23 Mar 2016, 23:53

6

3

2,149

27 Jun 2017, 10:41

7!! ER

The average age of students in class A is 15 years. What is the age of

505-555 Level | Statistics and Sets Problems

505-555 Level | Statistics and Sets Problems hide tags

danlew

27 Jun 2017, 05:35

4

8,677

by: shashankism

27 Jun 2017, 23:09

7!! ER

Is y^3 < |y|?

555-605 Level | Absolute Values, Inequalities

555-605 Level | Absolute Values, Inequalities hide tags

ydmuley

25 Jun 2017, 09:03

1

9

2,634

by: niks18

28 Jun 2017, 12:34

7!! ER

Robin and Barney, the guitarist and bassist, respectively, of a popula

505-555 Level | Word Problems

505-555 Level | Word Problems hide tags

Bunuel

16 Feb 2015, 06:51

3

7

3,091

28 Jun 2017, 12:40

7!! ER

If a, b, and c are distinct nonzero numbers, is (a b)^3(b c)/(a +

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

Bunuel

25 Nov 2014, 08:24

6

8

6,042

29 Jun 2017, 12:13

7!! ER

A larger playground has a rectangular-shaped track shaded shown as abo

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MathRevolution

26 Apr 2017, 01:16

7

9

1,613

by: Sash143

03 Jul 2017, 05:47

7!! ER

Three friends are trying to decide how to split up a tub of ice cream.

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VyshakhR1995

06 Apr 2017, 04:02

2

7

3,097

03 Jul 2017, 10:23

7!! ER

A quadrilateral is inscribed in a circle. If the

655-705 Level | Geometry

655-705 Level | Geometry hide tags

Smita04

02 Feb 2012, 06:30

11

14

7,792

by: MathRevolution

03 Jul 2017, 13:52

7!! ER

P is a set of integers. If a is the average of the odd integers and b

555-605 Level | Absolute Values, Number Properties

555-605 Level | Absolute Values, Number Properties hide tags

Bunuel

03 Jul 2017, 05:02

5

4

2,246

by: chetan2u

04 Jul 2017, 10:46

7!! ER

Is (a^2 + b^2)^1/2 an integer

655-705 Level | Algebra

655-705 Level | Algebra hide tags

jedit

04 Jul 2017, 23:40

4

2

2,081

by: jedit

05 Jul 2017, 00:00

7!! ER

Is rst > 1?

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

Bunuel

14 Jun 2017, 06:49

2

7

2,501

by: JeffTargetTestPrep

06 Jul 2017, 18:30

7!! ER

What is area of triangle ABC?

505-555 Level | Geometry

505-555 Level | Geometry hide tags

kanigmat011

18 Feb 2015, 03:20

17

11

3,999

08 Jul 2017, 02:01

7!! ER

What is the average of x and y?

Sub 505 Level | Number Properties

Sub 505 Level | Number Properties hide tags

shyind

04 Nov 2015, 06:27

12

2

18,696

08 Jul 2017, 14:50

7!! ER

Is x greater than zero?

655-705 Level | Inequalities

655-705 Level | Inequalities hide tags

Tan2017

10 Jul 2017, 19:25

1

1,792

11 Jul 2017, 01:41

7!! ER

If a and b are positive integers, is a + b even?

505-555 Level | Number Properties

505-555 Level | Number Properties hide tags

Bunuel

06 Dec 2016, 07:25

1

10

2,412

by: harikrish

11 Jul 2017, 09:23

7!! ER

What is the volume of cubical box in cubic centimeters? I.One face of

505-555 Level | Geometry

505-555 Level | Geometry hide tags

Sajjad1994

10 Feb 2017, 07:28

2

3

3,983

by: gmathopeful19

11 Jul 2017, 17:53

7!! ER

The area of a rectangular lot is 900 feet. What is the

655-705 Level | Geometry

655-705 Level | Geometry hide tags

metallicafan

09 Mar 2012, 09:26

6

2

3,747

by: IdiomSavant

12 Jul 2017, 14:51

7!! ER

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

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

Bunuel

14 Jul 2017, 00:17

2

3

4,158

by: Luckisnoexcuse

14 Jul 2017, 02:49

7!! ER

What is the value of the integer n? (1) n(n + 2) = 15 (2) (n

555-605 Level | Algebra, Exponents

555-605 Level | Algebra, Exponents hide tags

ajit257

30 Dec 2010, 17:27

55

7

35,100

by: akshayk

14 Jul 2017, 12:41

7!! ER

In a zoo, the ratio of elephants to lions is same as lions to deer. If

805+ Level | Fractions and Ratios, Number Properties

805+ Level | Fractions and Ratios, Number Properties hide tags

chetan2u

16 Jul 2017, 01:30

3

13

3,302

by: srikanth9502

17 Jul 2017, 04:15

7!! ER

What is the value of x^2 y^2?

555-605 Level | Absolute Values, Algebra

555-605 Level | Absolute Values, Algebra hide tags

Bunuel

25 Jul 2016, 10:12

13

6

3,960

17 Jul 2017, 06:06

7!! ER

If m is an integer, is m^4 divisible by 5?

Sub 505 Level | Multiples and Factors

Sub 505 Level | Multiples and Factors hide tags

Bunuel

02 Nov 2016, 03:00

1

5

2,055

by: Nunuboy1994

17 Jul 2017, 17:05

7!! ER

Many different groups apply to march in the annual GLBTGQ, etc. parade

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chuchu1957

21 Jan 2015, 04:21

18

12

5,189

by: rekhabishop

18 Jul 2017, 05:12

7!! ER

ABC is a triangle with BC = AC = 6. D is a point on AB. What is the

605-655 Level | Geometry

605-655 Level | Geometry hide tags

Bunuel

17 Jul 2017, 23:19

2

7

2,202

by: gmat4varun

19 Jul 2017, 01:29

7!! ER

Out of 50 people, there are 35 people with college degrees and 30 fema

505-555 Level | Overlapping Sets

505-555 Level | Overlapping Sets hide tags

MathRevolution

17 Jul 2017, 01:58

2

1,782

by: MathRevolution

19 Jul 2017, 01:57

7!! ER

When x and y are integers, a3b4=c, a=?

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MathRevolution

05 Jun 2016, 19:32

1

3

1,855

by: GGMU

19 Jul 2017, 10:16

7!! ER

If n and x are positive integers, what is the least common multiple of

655-705 Level | Exponents +2 tags

655-705 Level | Exponents, Multiples and Factors, Number Properties hide tags

Bunuel

28 Apr 2016, 03:33

9

2

3,633

by: akshayk

20 Jul 2017, 12:46

7!! ER

Can the positive integer y be expressed as the product of two integers

655-705 Level | Number Properties

655-705 Level | Number Properties hide tags

Bunuel

11 Jan 2015, 12:38

4

10

4,489