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Series Completion

Description: For Competition
Number of Questions: 24
Created by:
Tags: Reasoning Series and Classification Series Completion Input-Output
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Directions: Choose the correct alternative and complete the series.

134, 245, 356, 467, (….)

  1. 478

  2. 579

  3. 568

  4. 578

Show answer
Correct Option: D
Explanation:

Each term is obtained by adding 111 to the preceding term THe missing number is 467 + 111 = 578

Directions: Choose the correct alternative and complete the series.

1, 2, 6, 24, (….)

  1. 95

  2. 60

  3. 150

  4. 120

Show answer
Correct Option: D
Explanation:

The pattern is × 2, × 3, × 4, …… THe missing number is 24 × 5 = 120

Directions: Choose the correct alternative and complete the series.

4, 5, 9, 18, 34, (…..)

  1. 59

  2. 49

  3. 50

  4. 43

Show answer
Correct Option: A
Explanation:

The pattern is + 1, + 4, + 9, + 16… i.e. + 12, + 22, + 32, + 42 ……… The missing number is 34 + 52 = 59

Directions: Choose the correct alternative and complete the series.

66, 36, 18, (….)

  1. 6

  2. 9

  3. 3

  4. 8

Show answer
Correct Option: D
Explanation:

Each number in the series is the product of the digits of the preceding number. Thus 6 × 6 = 36, 3 × 6 = 18 The missing number is 1 × 8 = 8

Directions: Choose the correct alternative and complete the series.

3, 9, 27, 81, (….)

  1. 162

  2. 324

  3. 210

  4. 243

Show answer
Correct Option: D
Explanation:

Each term of the given series is obtained by multiplying its preceding term by 3. The missing number is 81 × 3 = 243

Directions: Choose the correct alternative and complete the series.

6, 11, 21, 36, 56, (….)

  1. 81

  2. 41

  3. 51

  4. 61

Show answer
Correct Option: A
Explanation:

The pattern is +5, +10, +15, +20, …… The missing number is 33 + 13 = 46

Directions: Choose the correct alternative and complete the series.

5, 17, 37, 65, (….), 145

  1. 97

  2. 101

  3. 99

  4. 95

Show answer
Correct Option: B
Explanation:

The numbers are 22+ 1, 42+ 1, 62+ 1, 82+ 1, …… 122 + 1 The missing number is 102+ 1 = 101

Directions: Choose the correct alternative and complete the series.

24, 60, 120, 210, (….)

  1. 525

  2. 300

  3. 336

  4. 420

Show answer
Correct Option: C
Explanation:

The pattern is +36, +60, +90,…..i.e. + [6 × (6 + 0)], + [6 × (6 + 4)], + [6 × (6 + 9)],….. The missing number is 210 + [6 × (6 + 150] = 210 + 126 = 336

Directions: Choose the correct alternative and complete the series.

5, 6, 9, 15, (….), 40

  1. 33

  2. 21

  3. 25

  4. 26

Show answer
Correct Option: C
Explanation:

The pattern is +1, +3, +6, …..i.e. +1, +(1+2) , + (1+2+3), …… The missing number is 15 + (1+2+3+4) = 25

Directions: Choose the correct alternative and complete the series.

3, 12, 27, 48, 75, 108, ….

  1. 163

  2. 192

  3. 183

  4. 147

Show answer
Correct Option: D
Explanation:

The numbers are 3 × 12, 3 × 22, 3 × 32, 3 × 42, 3 × 52, 3 × 62, ….. The missing number is 3 × 72 = 3 × 49 = 147

Directions: Choose the correct alternative and complete the series.

1, 2, 5, 12, 27, 58, 121, ______.

  1. 248

  2. 247

  3. 249

  4. 246

Show answer
Correct Option: A
Explanation:

The pattern is × 2 + 0, × 2 + 1, × 2 + 2, × 2 + 3, × 2 + 4, × 2 + 5,…….. The missing number is 121 × 2 + 6 = 248

Directions: Choose the correct alternative and complete the series.

121, 225, 361, (…)

  1. 529

  2. 484

  3. 729

  4. 441

Show answer
Correct Option: A
Explanation:

The numbers are 112, 152, 192,…… i.e. 112, (11 + 4 × 1)2, (11 + 4 × 22), ….., The missing number is ( 11+4 × 3)2= (23)2 = 529

Directions: Choose the correct alternative and complete the series.

462, 420, 380, (….), 306

  1. 332

  2. 342

  3. 352

  4. 323

Show answer
Correct Option: B
Explanation:

Each number is 15 multiplied by a prime number i.e. 15 × 11, 15 × 13, 15 × 17, 15 × 19, 15 × 23, The missing number is 15 × 29 = 435

Directions: Choose the correct alternative and complete the series.

2, 5, 9, (…), 20, 27

  1. 16

  2. 18

  3. 14

  4. 24

Show answer
Correct Option: C
Explanation:

The pattern is +3, +4, .. …. The missing number is 9 + 5 = 14

Directions: Choose the correct alternative and complete the series.

3, 8, 22, 63, 185, (….)

  1. 310

  2. 285

  3. 239

  4. 550

Show answer
Correct Option: D
Explanation:

 4,….. The missing number is (185 × 3) - 5 = 550

Directions: Choose the correct alternative and complete the series.

5, 16, 49, 104, (….)

  1. 181

  2. 148

  3. 115

  4. 170

Show answer
Correct Option: A
Explanation:

The pattern is + 11, + 33, + 55, …… i.e. + (11 × 1), + (11 × 3), + (11 × 5),….. The missing number is 104 + (11 × 7)

Directions: Choose the correct alternative and complete the series.

1, 2, 3, 5, 8, (….)

  1. 11

  2. 13

  3. 9

  4. 15

Show answer
Correct Option: B
Explanation:

Each term in the series is the sum of the preceding two terms Thus 1 + 2 = 3 ; 2 + 3 = 5 ; 3 + 5 = 8 The missing number is 5 + 8 = 13

Directions: Choose the correct alternative and complete the series.

4, 32, 128, …

  1. 256

  2. 144

  3. 128

  4. 192

Show answer
Correct Option: A
Explanation:

The pattern is × 8, × 4, …. The missing number is 128 × 2 = 256

Directions: Choose the correct alternative and complete the series.

1, 4, 9, 16, 25, (…..)

  1. 49

  2. 35

  3. 36

  4. 48

Show answer
Correct Option: C
Explanation:

The numbers are 12, 22, 32, 42, 52 The missing number is 62 = 36

Directions: Choose the correct alternative and complete the series.

0, 2, 8, 14, _____, 34

  1. 22

  2. 18

  3. 24

  4. 20

Show answer
Correct Option: C
Explanation:

The numbers are 12- 1,  22- 2, 32- 1, 42- 2 The missing number is 52- 1 = 24

Directions: Choose the correct alternative and complete the series.

563, 647, 479, 815, (….)

  1. 143

  2. 386

  3. 279

  4. 672

Show answer
Correct Option: A
Explanation:

The pattern is +84, - 168, +336,…..i.e. +84, - (84 × 2), + (84 + 22)……. The missing number is 815 - (84 × 23) = 815 - 672 = 143

Directions: Choose the correct alternative and complete the series.

20, 19, 17, (…..), 10, 5

  1. 14

  2. 13

  3. 12

  4. 11

Show answer
Correct Option: A
Explanation:

The patter is - 1, -2,….. The missing number is 17 - 3 = 14

Directions: Choose the correct alternative and complete the series.

2, 15, 41, 80, (….)

  1. 132

  2. 120

  3. 111

  4. 121

Show answer
Correct Option: A
Explanation:

The pattern is + 13, +26, +39,….. The missing number is 80 + 52 = 132

Directions: Choose the correct alternative and complete the series.

97, 86, 73, 58, 45, (….)

  1. 56

  2. 45

  3. 55

  4. 34

Show answer
Correct Option: D
Explanation:

The pattern is - 11, - 13, -15, -13,…… The missing number is 45 - 11 = 34

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