Mathematical Reasoning and Aptitude
Reasoning - Series

Meaning:
Series is a sequential order of Letters, Numbers or both arranged in such a way that each term in the series is obtained according to a specific rules.

Types of Series:
  • Number series
  • Letter Series


1. Number Series:
Number series is a form of series in which particular numbers are present in a particular order and we should find out the missing numbers.

Types of Number Series:
  • Even series
  • Odd series
  • Prime series
  • Square series
  • Cube series
  • Arithmetic series
  • Geometric series
2. Letter Series:
The series follows a specific pattern and the candidate is required to find out the letters which should come in place of the missing spaces. 

 Concept of 'EJOTY'
Letter
E
J
O
T
Y
Number
5
10
15
20
25

The candidates can determine the relative positions of various alphabets by just remembering the word 'EJOTY'.