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Number Series - Logical Reasoning Question and Answers

### Number Series Questions and Answers

#### Article

Q 1
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

Correct Option - C

ExplanationThis is a simple multiplication series. Each number is 2 times greater than the previous number.

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Q 2
Look at this series: J14, L16, __, P20, R22, ... What number should fill the blank?

A)   S24

B)   N18

C)   M18

D)   T24

Correct Option - B

ExplanationIn this series, the letters progress by 2, and the numbers increase by 2.

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Q 3
16 26 56 36 46 68 56

A)   80 66

B)   64 82

C)   66 80

D)   78 68

Correct Option - C

ExplanationHere, every third number follows a different pattern from the main series. In the main series, beginning with 16, 10 is added to each number to arrive at the next. In the alternating series, beginning with 56, 12 is added to each number to arrive at the next.

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Q 4
Look at this series: 15, __, 27, 27, 39, 39, ... What number should fill the blank?

A)   51

B)   49

C)   23

D)   15

Correct Option - D

ExplanationIn this simple addition with repetition series, each number in the series repeats itself, and then increases by 12 to arrive at the next number.

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Q 5
44 41 38 35 32 29 26

A)   24 21

B)   22 19

C)   23 19

D)   23 20

Correct Option - D

ExplanationThis is a simple subtraction series, in which 3 is subtracted from each number to arrive at the next.

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Q 6
Look at this series: V, VIII, XI, XIV, __, XX, ... What number should fill the blank?

A)   IX

B)   XXIII

C)   XV

D)   XVII

Correct Option - D

ExplanationThis is a simple addition series; each number is 3 more than the previous number.

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Q 7
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

Correct Option - B

ExplanationThis is a simple alternating addition and subtraction series. The first series begins with 8 and adds 3; the second begins with 43 and subtracts 2.