Number Series Aptitude MCQ Questions with Answers

Set 1

Start off with these simple series of numbers. Number series questions measure your ability to reason without words. To answer these questions, you must determine the pattern of the numbers in each series before you will be able to choose which number comes next. These questions involve only simple arithmetic. Although most number series items progress by adding or subtracting, some questions involve simple multiplication or division. In each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much?

Question. Look at this series: 2, 4, 6, 8, 10, . . . What number should come next?
a. 11
b. 12
c. 13
d. 14
Answer : B

Question. Look at this series: 58, 52, 46, 40, 34, . . . What number should come next?
a. 26
b. 28
c. 30
d. 32
Answer : B

Question. Look at this series: 40, 40, 47, 47, 54, . . . What number should come next?
a. 40
b. 44
c. 54
d. 61
Answer : C

Question. Look at this series: 544, 509, 474, 439, . . . What number should come next?
a. 404
b. 414
c. 420
d. 445
Answer : A

Question. Look at this series: 201, 202, 204, 207, . . . What number should come next?
a. 205
b. 208
c. 210
d. 211
Answer : D

Question. Look at this series: 8, 22, 8, 28, 8, . . . What number should come next?
a. 9
b. 29
c. 32
d. 34
Answer : D

Question. Look at this series: 80, 10, 70, 15, 60, . . . What number should come next?
a. 20
b. 25
c. 30
d. 50
Answer : A

Question. Look at this series: 36, 34, 30, 28, 24, . . . What number should come next?
a. 20
b. 22
c. 23
d. 26
Answer : B

Question. Look at this series: 22, 21, 23, 22, 24, 23, . . . What number should come next?
a. 22
b. 24
c. 25
d. 26
Answer : C

Question. Look at this series: 3, 4, 7, 8, 11, 12, . . . What number should come next?
a. 7
b. 10
c. 14
d. 15
Answer : D

Question. Look at this series: 31, 29, 24, 22, 17, . . . What number should come next?
a. 15
b. 14
c. 13
d. 12
Answer : A

Question. Look at this series: 21, 9, 21, 11, 21, 13, . . .What number should come next?
a. 14
b. 15
c. 21
d. 23
Answer : C

Question. Look at this series: 53, 53, 40, 40, 27, 27, . . .What number should come next?
a. 12
b. 14
c. 27
d. 53
Answer : B

Question. Look at this series: 2, 6, 18, 54, . . . What number should come next?
a. 108
b. 148
c. 162
d. 216
Answer : C

Question. Look at this series: 1,000, 200, 40, . . . What number should come next?
a. 8
b. 10
c. 15
d. 20
Answer : A

Question. Look at this series: 7, 10, 8, 11, 9, 12, . . . What number should come next?
a. 7
b. 10
c. 12
d. 13
Answer : B

Question. Look at this series: 14, 28, 20, 40, 32, 64, . . .What number should come next?
a. 52
b. 56
c. 96
d. 128
Answer : B

Question. Look at this series: 1.5, 2.3, 3.1, 3.9, . . . What number should come next?
a. 4.2
b. 4.4
c. 4.7
d. 5.1
Answer : C

Question. Look at this series: 5.2, 4.8, 4.4, 4, . . . What number should come next?
a. 3
b. 3.3
c. 3.5
d. 3.6
Answer : D

Question. Look at this series: 2, 1,1/2, 1/4, . . . What number should come next?
a. 1/3
b. 1/8
c. 2/8
d. 1/16
Answer : B

Set 2

This set contains additional, and sometimes more difficult, number series questions. Again, each question has a definite pattern. Some of the number series may be interrupted by a particular number that appears periodically in the pattern. For example, in the series 14, 16, 32, 18, 20, 32, 22, 24, 32, the number 32 appears as every third number. Sometimes, the pattern contains two alternating series. For example, in the series 1, 5, 3, 7, 5, 9, 7, the pattern is add 4, subtract 2, add 4, subtract 2, and so on. Look carefully for the pattern, and then choose which pair of numbers comes next. Note also that you will be choosing from five options instead of four.

Question. 84 78 72 66 60 54 48
a. 44 34
b. 42 36
c. 42 32
d. 40 34
e. 38 32
Answer : B

Question. 3 8 13 18 23 28 33
a. 39 44
b. 38 44
c. 38 43
d. 37 42
e. 33 38
Answer : C

Question. 20 20 17 17 14 14 11
a. 8 8
b. 11 11
c. 11 14
d. 8 9
e. 11 8
Answer : E

Question. 18 21 25 18 29 33 18
a. 43 18
b. 41 44
c. 37 18
d. 37 41
e. 38 41
Answer : D

Question. 9 11 33 13 15 33 17
a. 19 33
b. 33 35
c. 33 19
d. 15 33
e. 19 21
Answer : A

Question. 2 8 14 20 26 32 38
a. 2 46
b. 44 50
c. 42 48
d. 40 42
e. 32 26
Answer : B

Question. 28 25 5 21 18 5 14
a. 11 5
b. 10 7
c. 11 8
d. 5 10
e. 10 5
Answer : A

Question. 9 12 11 14 13 16 15
a. 14 13
b. 18 21
c. 14 17
d. 12 13
e. 18 17
Answer : E

Question. 75 65 85 55 45 85 35
a. 25 15
b. 25 85
c. 35 25
d. 85 35
e. 25 75
Answer : B

Question. 1 10 7 20 13 30 19
a. 26 40
b. 29 36
c. 40 25
d. 25 31
e. 40 50
Answer : C

Question. 10 20 25 35 40 50 55
a. 70 65
b. 60 70
c. 60 75
d. 60 65
e. 65 70
Answer : E

Question. 40 40 31 31 22 22 13
a. 13 4
b. 13 5
c. 4 13
d. 9 4
e. 4 4
Answer : A

Question. 17 17 34 20 20 31 23
a. 26 23
b. 34 20
c. 23 33
d. 27 28
e. 23 28
Answer : E

Question. 2 3 4 5 6 4 8
a. 9 10
b. 4 8
c. 10 4
d. 9 4
e. 8 9
Answer : D

Question. 61 57 50 61 43 36 61
a. 29 61
b. 27 20
c. 31 61
d. 22 15
e. 29 22
Answer : E

Question. 9 16 23 30 37 44 51
a. 59 66
b. 56 62
c. 58 66
d. 58 65
e. 54 61
Answer : D

37. 8 22 12 16 22 20 24
a. 28 32
b. 28 22
c. 22 28
d. 32 36
e. 22 26
Answer : C

Question. 6 20 8 14 10 8 12
a. 14 10
b. 2 18
c. 4 12
d. 2 14
e. 14 14
Answer : D

Question. 11 16 21 26 31 36 41
a. 47 52
b. 46 52
c. 45 49
d. 46 51
e. 46 52
Answer : D

Question. 8 11 21 15 18 21 22
a. 25 18
b. 25 21
c. 25 29
d. 24 21
e. 22 26
Answer : B

Set 3 

This set will give you additional practice dealing with number series questions.

Question. 44 41 38 35 32 29 26
a. 24 21
b. 22 19
c. 23 19
d. 29 32
e. 23 20
Answer : E

Question. 6 10 14 18 22 26 30
a. 36 40
b. 33 37
c. 38 42
d. 34 36
e. 34 38
Answer : E

Question. 34 30 26 22 18 14 10
a. 8 6
b. 6 4
c. 14 18
d. 6 2
e. 4 0
Answer : D

Question. 2 44 4 41 6 38 8
a. 10 12
b. 35 32
c. 34 9
d. 35 10
e. 10 52
Answer : D

Question. 32 29 26 23 20 17 14
a. 11 8
b. 12 8
c. 11 7
d. 32 29
e. 10 9
Answer : A

Question. 14 14 26 26 38 38 50
a. 60 72
b. 50 62
c. 50 72
d. 62 62
e. 62 80
Answer : B

Question. 8 12 9 13 10 14 11
a. 14 11
b. 15 12
c. 8 15
d. 15 19
e. 8 5
Answer : B

Question. 4 7 26 10 13 20 16
a. 14 4
b. 14 17
c. 18 14
d. 19 13
e. 19 14
Answer : E

Question. 3 8 10 15 17 22 24
a. 26 28
b. 29 34
c. 29 31
d. 26 31
e. 26 32
Answer : C

Question. 17 14 14 11 11 8 8
a. 8 5
b. 5 2
c. 8 2
d. 5 5
e. 5 8
Answer : D

Question. 13 29 15 26 17 23 19
a. 21 23
b. 20 21
c. 20 17
d. 25 27
e. 22 20
Answer : B

Question. 16 26 56 36 46 68 56
a. 80 66
b. 64 82
c. 66 80
d. 78 68
e. 66 82
Answer : C

Question. 7 9 66 12 14 66 17
a. 19 66
b. 66 19
c. 19 22
d. 20 66
e. 66 20
Answer : A

Question. 3 5 35 10 12 35 17
a. 22 35
b. 35 19
c. 19 35
d. 19 24
e. 22 24
Answer : C

Question. 36 31 29 24 22 17 15
a. 13 11
b. 10 5
c. 13 8
d. 12 7
e. 10 8
Answer : E

Question. 42 40 38 35 33 31 28
a. 25 22
b. 26 23
c. 26 24
d. 25 23
e. 26 22
Answer : C

Question. 11 14 14 17 17 20 20
a. 23 23
b. 23 26
c. 21 24
d. 24 24
e. 24 27
Answer : A

Question. 17 32 19 29 21 26 23
a. 25 25
b. 20 22
c. 23 25
d. 25 22
e. 27 32
Answer : C

Question. 10 34 12 31 14 28 16
a. 25 18
b. 30 13
c. 19 26
d. 18 20
e. 25 22
Answer : A

Question. 32 31 32 29 32 27 32
a. 25 32
b. 31 32
c. 29 32
d. 25 30
e. 29 30
Answer : A

Set 4 

This set contains additional number series questions, some of which are in Roman numerals. These items differ from Sets 1, 2, and 3 because they ask you to find the number that fits somewhere into the middle of the series. Some of the items involve both numbers and letters; for these questions, look for a number series and a letter series. (For additional practice in working letter series questions, see Set 5.)

Question. Look at this series: 8, 43, 11, 41, __, 39, 17, . . .What number should fill in the blank?
a. 8
b. 14
c. 43
d. 44
Answer : B

Question. Look at this series: 15, __, 27, 27, 39, 39, . . .What number should fill the blank?
a. 51
b. 39
c. 23
d. 15
Answer : D

Question. Look at this series: 83, 73, 93, 63, __, 93, 43, . . .What number should fill the blank?
a. 33
b. 53
c. 73
d. 93
Answer : B

Question. Look at this series: 4, 7, 25, 10, __, 20, 16, 19, . . .What number should fill the blank?
a. 13
b. 15
c. 20
d. 28
Answer : A

Question. Look at this series: 72, 76, 73, 77, 74, __, 75, . . .What number should fill the blank?
a. 70
b. 71
c. 75
d. 78
Answer : D

Question. Look at this series: 70, 71, 76, __, 81, 86, 70, 91, . . .What number should fill the blank?
a. 70
b. 71
c. 80
d. 96
Answer : A

Question. Look at this series: 664, 332, 340, 170, __, 89, . . .What number should fill the blank?
a. 85
b. 97
c. 109
d. 178
Answer : D

Question. Look at this series: 0.15, 0.3, __, 1.2, 2.4, . . .What number should fill the blank?
a. 4.8
b. 0.006
c. 0.6
d. 0.9
Answer : C

Question. Look at this series: 1/9, 1/3, 1, 9, . . . What number should fill the blank?
a. 2/3
b. 3
c. 6
d. 27
Answer : B

Question. Look at this series: U32, V29, __, X23, Y20, . . .What number should fill the blank?
a. W26
b. W17
c. Z17
d. Z26
Answer : A

Question. Look at this series: J14, L16, __, P20, R22, . . .What number should fill the blank?
a. S24
b. N18
c. M18
d. T24
Answer : B

Question. Look at this series: F2, __, D8, C16, B32, . . .What number should fill the blank?
a. A16
b. G4
c. E4
d. E3
Answer : C

Question. Look at this series: V, VIII, XI, XIV, __, XX, . . .What number should fill the blank?
a. IX
b. XXIII
c. XV
d. XVII
Answer : D

Question. Look at this series: XXIV, XX, __, XII, VIII, . . .What number should fill the blank?
a. XXII
b. XIII
c. XVI
d. IV
Answer : C

Question. Look at this series: VI, 10, V, 11, __, 12, III, . . .What number should fill the blank?
a. II
b. IV
c. IX
d. 14
Answer : B