Series is one of the most common questions on non-verbal reasoning. In such type of questions there is a sequence of figures depicting a change step by step. The candidate is required to identify the changes in each step and then answer the question as directed.

    There can be only one way of solving problems based on series; being able to identify the rule of sequence, i.e. the rule on which the series progresses. There can be no other short cut method for such problems. But by being familiar with general rules of forming series and by sufficient practice, one can master series problem.

    There are various type of series like
    1. Four figure series
    2. Five figure series
    3. Six figure series
    4. Seven Figure series
    5. Missing Figure series

    But in bank exams, generally only four Figure series and five Figure series came.

    Classification of Series

    1) Addition and Subtraction of elements

    It is based on the number of elements or components. It should be noted whether numbers are increasing or decreasing. It is the simplest form of series. Here, no hard core observation is required. You will notice the change at the first instance.

    2) Rotations or Angular movements

    The elements here rotate in these series in a definite pattern and thereby create a sequence. One should have to keenly observe and detect the pattern of rotation.

    Rotation is of two types

    a) Clockwise (You move to your Right Hand Side)

    b) Anti-clockwise (You move to your Left Hand Side)

    Angular Movements

    ) Element move 30 degree clockwise

    ii) Element move 45 degree clockwise/Anti clockwise

    iii) Element move 60 degree clockwise/Anti clockwise

    iv) Element move 90 degree clockwise/Anti clockwise

    v) Element move 135 degree clockwise/Anti clockwise

    vi) Element move 180 degree clockwise/Anti clockwise

    3) Shifting of elements

    When an element changes its position, it is said to be shifted. In this type, the number of element remain constant, means, the elements at answer figure are same as that of question figure.

    4) Size of elements

    The series is based on increasing or decreasing size of elements. Here, generally, one of the element increases or decreases in size.

    5) Appearance and disappearance of new element

    In this series, new element may be being added on a definite pattern. Or the existing elements may be disappearing on a definite pattern or at definite places.

    6) Mixed series

    When, in a series, more than one form of classification is occurring.