A sequence of several terms is known as series. Each unit of a sequence or series is called a term or an element. All terms in a series follow a certain pattern throughout the sequence. Each term in the series is important because there exists a certain relationship between two consecutive terms. Several types of questions are asked on series in competitive examinations. There are two types of series. The questions based on the English Alphabet series are somewhat easy because one can remember the position of each alphabet easily. e.g. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
(i) Find the eighteenth letter in the above alphabet series.
The 18th letter counting from the left end is ‘R’.
(ii) Find the tenth letter from the right.
When we count from the right to the left, the tenth letter is ‘Q’.
This is an example of simple series and questions on this are relatively simple.