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# Formula To Solve Number Series

**Formulas for Number series**

Basic Information
Here , in this Page Formulas for Number series is given By using some logical rule/ pattern based on elementary Arithmetic concepts.
The pattern should be analyzed to solve the 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:

**Perfect square series:-**Consists of a set of numbers that are perfect squares.**Perfect****cube series:-**Consists of a sequential order of numbers that are perfect cubes of the given term**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.**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.**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.**Mixed series:-**Consists of a set of numbers whose calculation might require either one or more than one mathematical concept.

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