Series completion is an important topic in the Logical Reasoning part of Aptitude exam. Questions in this topic vary from easy to difficult level. In these type of questions, a set of numbers will be given, wherein we have to identify the next number based on a specific logic. Important topics covered in this section are serious completion, number series, etc.

Practising with a different set of numbers would give you an edge. After you complete this section, move to Analogy aptitude questions.

Q1

Find the missing term.

2, 5, 9, 19, 37, ?

Level 1
Series Completion
Number Series

A

73

B

75

C

76

D

78

Q2

Find the missing term in the series.

6,12,21,?,48

Level 1
Series Completion
Number Series

A

33

B

38

C

40

D

45

Q3

Find the missing term in the series.

120,99,80,63,48,?

Level 1
Series Completion
Number Series

A

35

B

38

C

39

D

40

Q4

Find the missing term in the series.

10,100,200,310,?

Level 1
Series Completion
Number Series

A

400

B

410

C

420

D

430

Q5

Find the missing term in the series.

4,12,36,108,?

Level 1
Series Completion

A

144

B

216

C

304

D

324

Q6

Find the missing term in the series.

1,9,25,49,81,?

Level 1
Series Completion

A

100

B

112

C

121

D

144

Q7

Find the missing term in the series.

45,54,47,?,49,56,51,57,53

Level 1
Series Completion
Number Series

A

48

B

50

C

55

D

None of these

Q8

In the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

a-n-b--ncb--ncb

Level 1
Series Completion

A

abbbcc

B

abcbcb

C

bacbab

D

bcabab

Q9

Which fraction comes next in the series \(\frac{1}{2}\), \(\frac{3}{4}\), \(\frac{5}{8}\), \(\frac{7}{16}\)?

Level 2
Series Completion
Number Series

A

\(\frac{9}{32}\)

B

\(\frac{10}{7}\)

C

\(\frac{1}{34}\)

D

\(\frac{12}{35}\)

Q10

Find the missing term in the series.

48,24,96,48,192,?

Level 2
Series Completion

A

76

B

90

C

96

D

98

Q11

Find the missing term in the series.

9,27,31,155,161,1127,?

Level 2
Series Completion

A

316

B

1135

C

1288

D

2254

Q12

Find the missing term in the series.

1,5,14,30,55,91,?

Level 2
Series Completion

A

130

B

140

C

150

D

160

Q13

Find the missing term in the series.

8,28,116,584,?

Level 2
Series Completion

A

1752

B

3502

C

3504

D

3508

Q14

Find the missing term in the series.

2,7,27,107,427,?

Level 2
Series Completion

A

1262

B

1707

C

4027

D

4207

Q15

Find the missing term in the series.

625,5,125,25,?,5

Level 2
Series Completion

A

5

B

25

C

125

D

625

Q16

Find the missing term in the following series

Z,?,R,?,N,?,H,?,B

Level 2
Series Completion
Alphabet Series

A

W,Q,K,E

B

W,R,K,E

C

X,Q,K,E

D

X,R,K,E

Q17

In the following letter series, some of the letters and numbers are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

F _ U 6 _ 9 I _ T 7 _ 20 _ 4 D 23

Level 3
Series Completion

A

11,G,16,K,U

B

13,H,15,L,M

C

17,J,19,R,S

D

21,R,18,G,W

Q18

In the following letter series, some of the letters and numbers are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

D _ 6 E G P _ H J _ 12 K M B 15 _

Level 3
Series Completion

A

E,7,J,L

B

F,8,M,K

C

G,9,I,M

D

J,9,V,M

Q19

Find the missing term in the following series

AYBZC,DWEXF,GUHVI,JSKTL,?

Level 3
Series Completion
Alphabet Series

A

MQORN

B

MQNRO

C

NQMOR

D

QMONR

Q20

Find the missing term in the following series

BMX,DNW,FOU,?

Level 3
Series Completion

A

GHO

B

GPS

C

HPS

D

HPT

E

HQS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20