Logical Reasoning > Number Series

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Logical Reasoning > Number Series > Type 1

Directions to Solve
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

See attached file for Answers at End

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1.
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)

2.
Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?

A. 7 B. 10
C. 12 D. 13

3.
Look at this series: 36, 34, 30, 28, 24, ... What number should come next?

A. 20 B. 22
C. 23 D. 26

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4.
Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?

A. 22 B. 24
C. 25 D. 26

5.
Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?

A. 12 B. 14
C. 27 D. 53

6.
Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number should come next?

A. 14 B. 15
C. 21 D. 23

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7.
Look at this series: 58, 52, 46, 40, 34, ... What number should come next?

A. 26 B. 28
C. 30 D. 32

8.
Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?

A. 7 B. 10
C. 14 D. 15

9.
Look at this series: 8, 22, 8, 28, 8, ... What number should come next?

A. 9 B. 29
C. 32 D. 34


10.
Look at this series: 31, 29, 24, 22, 17, ... What number should come next?

A. 15 B. 14
C. 13 D. 12

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11.
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


12.
Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?

A. 52 B. 56
C. 96 D. 128


13.
Look at this series: 2, 4, 6, 8, 10, ... What number should come next?

A. 11 B. 12
C. 13 D. 14


14.
Look at this series: 201, 202, 204, 207, ... What number should come next?

A. 205 B. 208
C. 210 D. 211
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15.


A. 404 B. 414
C. 420 D. 445

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16.
Look at this series: 80, 10, 70, 15, 60, ... What number should come next?

A. 20 B. 25
C. 30 D. 50


17.
Look at this series: 2, 6, 18, 54, ... What number should come next?

A. 108 B. 148
C. 162 D. 216


18.
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


19.


A. 8 B. 10
C. 15 D. 20

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Logical Reasoning > Number Series > Type 2





Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.

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1.
28 25 5 21 18 5 14

A. 11 5
B. 10 7
C. 11 8
D. 5 10
E. 10 5 Answer is=A



2.
8 11 21 15 18 21 22

A. 25 18
B. 25 21
C. 25 29
D. 24 21
E. 22 26 Answer is=B

3

9 16 23 30 37 44 51

A. 59 66
B. 56 62
C. 58 66
D. 58 65
E. 54 61 Answer is=D

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4.
2 8 14 20 26 32 38

A. 2 46
B. 44 50
C. 42 48
D. 40 42
E. 32 26 Answer is=B

5.
9 11 33 13 15 33 17

A. 19 33
B. 33 35
C. 33 19
D. 15 33
E. 19 21 Answer is=A

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6.
2 3 4 5 6 4 8

A. 9 10
B. 4 8
C. 10 4
D. 9 4
E. 8 9

Explanation:

This is an alternating addition series with a random number, 4, interpolated as every third number. In the main series, 1 is added, then 2 is added, then 1, then 2, and so on.

7.
17 17 34 20 20 31 23

A. 26 23
B. 34 20
C. 23 33
D. 27 28
E. 23 28



Explanation:

This is an alternating subtraction series with repetition. There are two different patterns here. In the first, a number repeats itself; then 3 is added to that number to arrive at the next number, which also repeats. This gives the series 17, 17, 20, 20, 23, and so on. Every third number follows a second pattern, in which 3 is subtracted from each number to arrive at the next: 34, 31, 28.

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Option=D

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18.
40 40 31 31 22 22 13

A. 13 4
B. 13 5
C. 4 13
D. 9 4
E. 4 4


Explanation:

This is a subtraction series with repetition. Each number repeats itself and then decreases by 9.

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19.
1 10 7 20 13 30 19

A. 26 40
B. 29 36
C. 40 25
D. 25 31
E. 40 50


Explanation:

Here, every other number follows a different pattern. In the first series, 6 is added to each number to arrive at the next. In the second series, 10 is added to each number to arrive at the next.

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20.
10 20 25 35 40 50 55

A. 70 65
B. 60 70
C. 60 75
D. 60 65
E. 65 70

Explanation:

This is an alternating addition series, in which 10 is added, then 5, then 10, and so on.