# Number Series Problems - Questions and Solved Examples - Quantitative Aptitude Quiz

• 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)

Explanation: This is an example of division series; where each successive number is one-half of the previous number.
4/2 = 2; 2/2 = 1; 1/2 = 1/2; (1/2)/2 = 1/4; (1/4)/2 = 1/8 and so on.

• 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

Explanation: This is an example of addition series, where each successive number increases by 0.8.

## Quantitative Aptitude Made Simpler – Number Series I in Hindi (Basics and Methods, Examples, Math Tricks)

• Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?
A. 7
B. 10
C. 12
D. 13

Explanation: This is an example of alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted and so on.

• Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?
A. 7
B. 10
C. 14
D. 15

Explanation: This is an example of alternating addition series. In the first pattern, 1 is added; in the second, 3 is added and so on.

• Look at this series: 31, 29, 24, 22, 17, ... What number should come next?
A. 15
B. 14
C. 13
D. 12

Explanation: This is an example of alternating subtraction series. In the first pattern, 2 is subtracted; in the second, 5 is subtracted and so on.
• Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?
A. 52
B. 56
C. 96
D. 128

Explanation: This is an example of alternating multiplication and subtraction series. In the first pattern, 2 is multiplied, in the second, 8 is subtracted and so on.

• Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?
A. 22
B. 24
C. 25
D. 26

Explanation: This is an example of alternating subtraction and addition series. In the first pattern, 1 is subtracted; in the second, 2 is added and so on.

• Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?
A. 10
B. 14
C. 40
D. 53

Explanation: This is an example of repetition and subtraction number series. Each number is repeated, then 13 is subtracted to arrive at the next number.

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• Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number should come next?
A. 14
B. 15
C. 21
D. 23

Explanation: This is an example of alternative addition number series with a random number 21, interpolated as every other number. In the series, 2 is added to each number except 21, to arrive at the next number.

• Look at this series: 8, 22, 8, 28, 8, ... What number should come next?
A. 8
B. 28
C. 30
D. 34

Explanation: This is an example of addition series with a random number 8, interpolated as every other number. In the series, 6 is added to each number except 8, to arrive at the next number.

• Look at this series: 36, 34, 30, 28, 24, ... What number should come next?
A. 20
B. 22
C. 23
D. 26

Explanation: This is an example of Subtraction Number Series. -2 and -4 is followed.
• Look at this series: 58, 52, 46, 40, 34, ... What number should come next?
A. 26
B. 28
C. 30
D. 32

Explanation: This is an example of simple Subtraction Number Series. -6 is followed.

• Look at this series: 201, 202, 204, 207, ... What number should come next?
A. 205
B. 208
C. 210
D. 211

Explanation: This is an example of successive Addition Number Series. +1, +2, +3, +4 is followed.

• Look at this series: 544, 509, 474, 439, ... What number should come next?
A. 404
B. 414
C. 420
D. 445

Explanation: This is an example of simple Subtraction Number Series. -35 is followed.

## Quantitative Aptitude Made Simpler – Number Series II in Hindi (Basics and Methods, Examples, Math Tricks)

• Look at this series: 1,000, 200, 40, ... What number should come next?
A. 8
B. 10
C. 15
D. 20

Explanation: This is an example of Multiplication Number Series. 1000 is 5 times of 200. And 200 is 5 times of 40. Similarly, 40 is 5 times of 8.

• Look at this series: 4, ..., 14, 40, 88, 170. What number should come next?
A. 6
B. 8
C. 10
D. 12