__What is Number Series?__

Number series is a arrangement of numbers in a certain order, where some numbers are wrongly put into the series of numbers and some number is missing in that series, we need to observe and find the accurate number to the series of numbers.

In competitive exams number series are given and where you need to find missing numbers. The number series are come in different types. At first you have to decided what type of series are given in papers then according with this you have to use shortcut tricks as fast as you can .

**Q.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)

**Answer: Option B**

** Explanation:**

This is a simple division series; each number is one-half of the previous number.

In other terms to say, the number is divided by 2 successively to get the next result.

4/2 = 2

2/2 = 1

1/2 = 1/2

(1/2)/2 = 1/4

(1/4)/2 = 1/8 and so on.

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

A.7

B.10

C.12

D.13

**Answer: Option B**

** Explanation:**

This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.

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

A.20

B.22

C.23

D.26

**Answer: Option B**

** Explanation:**

This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.

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

A.22

B.24

C.25

D.26

Answer: Option C

Explanation:

In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.

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

A.12

B.14

C.27

D.53

**Answer: Option B**

** Explanation:**

In this series, each number is repeated, then 13 is subtracted to arrive at the next number.

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

A.20

B.25

C.30

D.50

**Answer: Option A**

** Explanation:**

This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.

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

A.108

B.148

C.162

D.216

**Answer: Option C**

** Explanation:**

This is a simple multiplication series. Each number is 3 times more than the previous number.