Numerical Series Reasoning MCQ tests are designed to determine how easily you think with the numbers. In these tests, a series of numbers is provided to you and your task is to see how these numbers are related to each other and then you have to choose correct answer from given options.


0 2 4 6 8 ______

  1. 5
  2. 10
  3. 15
  4. 20

Correct answer: 10

0 (+2) 2 (+2) 4(+2) 6(+2) 8(+2) 10


2 5 9 14 20 ________

  1. 24
  2. 25
  3. 26
  4. 27

Correct answer: 4. 27 is the correct answer

2 (+3) 5(+4) 9(+5) 14(+6) 20(+7) 27


10 18 28 46 74 120

  1. 166
  2. 180
  3. 194
  4. 222

Correct answer: 3. 194

Solution:

10 18 –> (10 + 18 = 28)

18 28 –> (18 + 28 = 46)

28 46 –> (28 + 46 = 74)

46 74 –> (46 + 74 = 120)

74 + 120 –> (74 + 120 = 194)


1 3 7 15 31

  1. 35
  2. 46
  3. 63
  4. 83

Correct answer: 3. 63

Solution:

1(1*2 + 1) = 3

3*2 + 1 = 7

7*2 + 1 = 15

15*2 + 1 = 31

31 * 2 + 1 = 63


20 70 40 140 60 210 ____

  1. 70
  2. 80
  3. 420
  4. 580

Correct answer: 2. 80

Question has two series:

  1. 20, 40, 60, 80 (Each digital in series increases by 20)
  2. 70, 140, 210, 280 (Each digit in series increases by 70)

However question needs only one digit and which is 80 (following the first series). So 2. is the correct answer


1 12 5 10 ___ 8 13 ___

  1. 8, 18
  2. 9, 19
  3. 9, 6
  4. 10, 19

Correct answer: 9, 6

Solution:

Above question has two series

  1. 1, 5, 9, 13 (Each number adds by 4)
  2. 12, 10, 8, 6 (Each number decrements by 2)

11 55 220 660 ____

  1. 880
  2. 1022
  3. 1320
  4. 7708

Correct answer: 3. 1320

Solution:

Each number is series is multiple of previous number with descending order of counting starting from 5

11 * 5 = 55

55 * 4 = 220

220 * 3 = 660

660 * 2 = 1320


11 13 17 19 23

  1. 24
  2. 25
  3. 28
  4. 29

Correct answer: 4. 29

Solution: Series of numbers perfectly divisible only by themselves or 1.


7 15 32 67 138 _____

  1. 279
  2. 280
  3. 281
  4. 282

Correct answer: 281

Solution: Each number is multiplied by 2 and natural number starting from 1 added to the series.

7 * 2 + 1 = 15

15 * 2 + 2 = 32

32 * 2 + 3 = 67

67 * 2 + 4 = 138

138 * 2 + 5 = 281


0 1 4 9 16 _____

  1. 24
  2. 25
  3. 27
  4. 36

Correct answer: 2. 25

Solution: The series follows a square of whole numbers including zero as well.

(0)2 + (1)2 + (2)2 + (3)2 + (4)2 + (5)2 = 0 + 1 + 4 + 9 + 16 + 25