The Concept of Number Series

Generally, two kinds of series are asked in the examination. One is based on numbers and the other based on alphabets. In questions based on series, some numbers or alphabets are arranged in a particular sequence. You have to decipher that particular sequence of numbers or alphabets and on the basis of that deciphered sequence, find out the next number or alphabet of the series. Although there is no limit of logics which can be used to build a series, here are some important Examples given which highlight the type of series asked in the examination.

How to solve number series problems:?

Step 1: Observer are there any familiar numbers in the given series. Familiar numbers are primes numbers, perfect squares, cubes ... which are easy to identify.

Step 2: Calculate the differences between the numbers. Observe the pattern in the differences. If the differences are growing rapidly it might be a square series, cube series, or multiplicative series. If the numbers are growing slowly it is an addition or subtraction series.

In almost all the objective type multiple choices examinations a few questions on Distance and Direction are asked regularly.

Our Research & Findings

#IBPS PO

As a sample we have choosen the last 4 year's (2019, 2018, 2017, 2016) previously asked question papers. In quatitative aptitude section, a total number of questions asked are 35. Out of these 35 questions 25.00% of questions are from Number Series.

#SBIPO

As a sample we have choosen the last 4 year's (2019, 2018, 2017, 2016) previously asked question papers. In quatitative aptitude section, a total number of questions asked are 35. Out of these 35 questions 14.29% of questions are from Number Series.

#TCSNQT

As a sample we have choosen the last 4 year's (2019, 2018, 2017, 2016) previously asked question papers. In quatitative aptitude section, a total number of questions asked are 26. Out of these 26 questions 10.00% of questions are from Number Series.

Teaching Methodology

  • Concepts based solutions
  • Short cut methods
  • Spatial visualization
Sample Question

2,3,7,16,32,….?
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