Problem Solving (PS)

28 Feb 2026, 09:41

ER

The positive integer n is divisible by 25. If n^1/2 is

505-555 (Easy) | Multiples and Factors +2 tags

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20 Dec 2012, 06:52

311

11

56,271

28 Feb 2026, 09:22

ER

If m^(-1) = -1/3 then m^(-2) is equal to

Sub 505 (Easy) | Exponents

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20 Dec 2012, 07:23

99

11

54,888

28 Feb 2026, 09:13

ER

If T = 5/9 * (K - 32), and if T = 290, then K =

505-555 (Easy) | Algebra

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07 Dec 2012, 06:48

58

7

34,451

26 Feb 2026, 13:07

ER

If y((3x-5)/2) =y and y#0, then x =

Sub 505 (Easy) | Algebra

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1, 2

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03 Dec 2012, 04:04

59

20

38,191

26 Feb 2026, 13:00

ER

If 1 + 1/x = 2 - 2/x, then x =

Sub 505 (Easy) | Algebra

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20 Dec 2012, 09:34

32

11

31,592

26 Feb 2026, 12:57

ER

If s > 0 and (r/s)^1/2=s, what what is r in terms of s ?

Sub 505 (Easy) | Algebra

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12 Dec 2012, 08:32

56

13

48,936

26 Feb 2026, 12:55

ER

Mary's income is 60 percent more than Tim's income, and Tim'

505-555 (Easy) | Percent and Interest Problems

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12 Dec 2012, 09:51

109

16

46,854

25 Feb 2026, 16:31

ER

Lois has x dollars more than Jim has, and together they have

Sub 505 (Easy) | Word Problems

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20 Dec 2012, 08:04

43

14

29,373

25 Feb 2026, 16:27

ER

In a weight-lifting competition, the total weight of Joe's t

Sub 505 (Easy) | Word Problems

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17 Dec 2012, 08:47

40

8

40,885

25 Feb 2026, 16:26

ER

There are 4 more women than men on Centerville's board of

Sub 505 (Easy) | Word Problems

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07 Dec 2012, 03:20

14

6

15,210

25 Feb 2026, 16:21

ER

David has d books, which is 3 times as many as Jeff and 1/2

Sub 505 (Easy) | Word Problems

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13 Dec 2012, 09:56

78

19

50,629

25 Feb 2026, 16:16

ER

If Jake loses 8 pounds, he will weigh twice as much as his

Sub 505 (Easy) | Word Problems

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07 Dec 2012, 05:08

88

12

55,648

25 Feb 2026, 16:14

ER

A store reported total sales of $385 million for February of

Sub 505 (Easy) | Percent and Interest Problems

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07 Dec 2012, 05:31

82

17

53,595

25 Feb 2026, 15:51

ER

A tank contains 10,000 gallons of a solution that is 5

505-555 (Easy) | Mixture Problems

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20 Dec 2012, 06:23

176

17

47,350

25 Feb 2026, 15:33

ER

During a certain season, a team won 80 percent of its first

Sub 505 (Easy) | Word Problems

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20 Dec 2012, 08:20

111

14

52,600

25 Feb 2026, 15:14

ER

Of the final grades received by the students in a certain

Sub 505 (Easy) | Fractions and Ratios

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26 Dec 2012, 07:04

66

9

40,582

25 Feb 2026, 15:13

ER

At least 2/3 of the 40 members of a committee must vote in

Sub 505 (Easy) | Min-Max Problems

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05 Dec 2012, 08:05

61

19

35,114

25 Feb 2026, 15:09

ER

If d=1/(2^3*5^7) is expressed as a terminating decimal, how many nonze

655-705 (Hard) | Exponents, Fractions and Ratios

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1, 2

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20 Dec 2012, 06:11

1.4k

24

127,012

24 Feb 2026, 13:24

ER

(0.0036)(2.8) / (0.04)(0.1)(0.003) =

555-605 (Medium) | Arithmetic, Exponents

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07 Dec 2012, 03:52

414

16

71,211

24 Feb 2026, 13:06

ER

If [x] is the greatest integer less than or equal to x, what is the va

505-555 (Easy) | Arithmetic, Functions and Custom Characters

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17 Dec 2012, 09:02

457

14

124,210

24 Feb 2026, 12:54

ER

If a = -0.3, which of the following is true?

555-605 (Medium) | Inequalities

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1, 2

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12 Dec 2012, 09:05

250

24

51,410

24 Feb 2026, 09:50

ER

(1/2)^(-3)*(1/4)^(-2)*(1/16)^(-1)

Sub 505 (Easy) | Arithmetic, Exponents

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29 Dec 2012, 05:58

266

15

59,095

24 Feb 2026, 09:46

ER

A gym class can be divided into 8 teams with an equal number

Sub 505 (Easy) | Multiples and Factors

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03 Dec 2012, 04:20

49

12

45,495

23 Feb 2026, 12:50

ER

The shaded portion of the rectangular lot shown above represents

505-555 (Easy) | Geometry

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1, 2

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19 Dec 2012, 06:28

116

21

42,241

20 Feb 2026, 02:18

ER

A border of uniform width is placed around a rectangular

655-705 (Hard) | Geometry

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1, 2, 3

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20 Dec 2012, 05:33

735

44

181,238

10 Feb 2026, 15:58

ER

If (4 - x)/(2 + x) = x, what is the value of x^2 + 3x -4 ?

Sub 505 (Easy) | Algebra

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17 Dec 2012, 09:12

83

14

34,568

23 Jan 2026, 00:00

ER

For the positive integers a, b, and k, a^k||b means that a^k

505-555 (Easy) | Exponents +3 tags

505-555 (Easy) | Exponents, Functions and Custom Characters, Multiples and Factors, Number Properties hide tags

1, 2

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12 Dec 2012, 03:59

396

22

88,483

by: egmat

22 Jan 2026, 23:08

ER

0.99999999/1.0001 - 0.99999991/1.0003 =

705-805 (Hard) | Algebra, Arithmetic

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1, 2, 3

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14 Sep 2020, 09:56

3.7k

44

201,586

15 Dec 2025, 22:43

ER

Club X has more than 10 but fewer than 40 members. Sometimes the membe

605-655 (Medium) | Remainders, Word Problems

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1, 2

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12 Dec 2012, 06:31

1.2k

22

112,580

11 Dec 2025, 16:53

ER

If n = 20! + 17, then n is divisible by which of the following?

Sub 505 (Easy) | Multiples and Factors

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1, 2

Walkabout

05 Dec 2012, 09:02

733

27

94,534

10 Dec 2025, 04:50

ER

A certain characteristic in a large population has a distribution that

555-605 (Medium) | Statistics and Sets Problems

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12 Dec 2012, 04:19

1.4k

19

118,956

06 Dec 2025, 00:05

ER

If p/q < 1, and p and q are positive integers, which of the

Sub 505 (Easy) | Fractions and Ratios +3 tags

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17 Dec 2012, 06:16

171

11

91,211

30 Nov 2025, 19:32

ER

A restaurant meal cost $35.50 and there was no tax. If the

505-555 (Easy) | Percent and Interest Problems

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17 Dec 2012, 08:30

43

7

31,651

by: KhayatiK

19 Nov 2025, 03:20

ER

In a certain game, a large container is filled with red, yel

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

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29 Dec 2012, 06:10

224

12

49,485

17 Nov 2025, 00:25

ER

For the positive numbers, n, n + 1, n + 2, n + 4, and n + 8

Sub 505 (Easy) | Statistics and Sets Problems

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07 Dec 2012, 06:38

73

14

51,289

04 Nov 2025, 19:14

ER

If 3 < x < 100, for how many values of x is x/3 the square

605-655 (Medium) | Number Properties

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1, 2

Walkabout

13 Dec 2012, 09:35

752

20

104,238

by: Ilanchezhiyan

03 Nov 2025, 02:13

ER

In Country C, the unemployment rate among construction worke

605-655 (Medium) | Percent and Interest Problems

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12 Dec 2012, 04:55

776

14

108,927

30 Oct 2025, 09:47

ER

To mail a package, the rate is x cents for the first pound and y cents

555-605 (Medium) | Word Problems

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17 Dec 2012, 06:37

235

16

49,799

03 Oct 2025, 08:02

ER

A straight pipe 1 yard in length was marked off in fourths

555-605 (Medium) | Fractions and Ratios

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31 Dec 2012, 05:21

633

11

69,353

by: egmat

29 Sep 2025, 01:23

ER

Working simultaneously at their respective constant rates, M

555-605 (Medium) | Work and Rate Problems

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1, 2

Walkabout

06 Dec 2012, 09:58

881

24

121,787

27 Sep 2025, 05:29

ER

If a, b, and c are consecutive positive integers and a < b <

Sub 505 (Easy) | Must or Could be True, Number Properties

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29 Dec 2012, 06:44

101

14

52,092

24 Sep 2025, 02:58

ER

If 2/(1+2/y)=1, then y =

Sub 505 (Easy) | Arithmetic

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29 Dec 2012, 06:27

35

13

28,712

by: PriyanshuR

23 Sep 2025, 23:28

ER

If x(2x + 1) = 0 and (x + 1/2)(2x - 3) = 0, then x =

Sub 505 (Easy) | Algebra

Sub 505 (Easy) | Algebra hide tags

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07 Dec 2012, 06:30

198

16

77,519

17 Sep 2025, 21:30

ER

As x increases from 165 to 166, which of the following must

555-605 (Medium) | Algebra, Must or Could be True

555-605 (Medium) | Algebra, Must or Could be True hide tags

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26 Dec 2012, 07:13

228

14

45,145

by: AdarshSambare

17 Sep 2025, 02:04

ER

For the past n days, the average (arithmetic mean) daily

505-555 (Easy) | Statistics and Sets Problems

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1, 2

Walkabout

27 Dec 2012, 06:28

239

29

66,185

by: EphraimMat

08 Sep 2025, 06:21

ER

If (x - 1)^2 = 400 which of the following could be the value

505-555 (Easy) | Algebra, Must or Could be True

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1, 2

Walkabout

20 Dec 2012, 09:07

169

20

47,607

by: ablatt4

25 Aug 2025, 14:34

ER

In the rectangular solid above, the three sides shown have areas 12

555-605 (Medium) | Geometry

555-605 (Medium) | Geometry hide tags

1, 2

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05 Dec 2012, 09:11

176

20

38,060

06 Aug 2025, 22:00

ER

The diagram above shows the various paths along which a mous

Sub 505 (Easy) | Combinations

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17 Dec 2012, 07:31

218

17

51,197

24 Jul 2025, 08:29

ER

A committee is composed of w women and m men. If 3 women and

Sub 505 (Easy) | Probability

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20 Dec 2012, 06:30

43

13

38,625