# Formula To Solve Number Series

## Formulas for Number series ### Definition and Number Series Formulas:

Number series is a sequence of numbers which is framed, using a particular system/rule, in which the numbers are not in a specific order. All we have to do is to find out the system/rule that a particular series is following and finding the number using that system/rule.

For Example : 3, 9, 27, 81 ?

It is Geometric series.

Each term is Multiplied by 3.

So , 81 x 3 = 243 ### Formulas For Number Series & Types of number series:-

There are Six different types of number series that are mentioned below:

1. Perfect square series:- Consists of a set of numbers that are perfect squares.
2. Perfect cube series:- Consists of a sequential order of numbers that are perfect cubes of the given term
3. Ration series:- This series might consist of a sequence of numbers, fractions or integers, wherein each term will be different from the other, with a set mathematical concept (/,*,-,+)  or formula which would be applicable to calculate the missing number.
4. Arithmetic series:- This series consists of numbers that are obtained by either (+, -) the previous number with a fixed common number known as Common difference, It is generally found either in an ascending or descending order.
5. Geometric series:- This series consists of numbers that are obtained by either (/, *) the previous number with a fixed common number known as Common ratio, It is generally found either in an ascending or descending order.
6. Mixed series:- Consists of a set of numbers whose calculation might require either one or more than one mathematical concept.

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