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IBPS Bank PO, SO, Clerk

Arithmetical Number Series Notes & Questions

We will study about the “Arithmetical Number Series” in the reasoning section of the IBPS bank exam and others. In this portion, question will be numerical, alphabetical and alphanumeric. These questions have some tricks and tips for solving them. Applicant must check that how to solve questions and with an explanation. Candidate must have downloaded these notes in PDF format.


What is arithmetical number series

In this series, there are missing one, wrong one and fill in the banks questions in numerical form and alphanumerical form. 

Number series is a form of numbers in a certain sequence, where some numbers are mistakenly given into the series of numbers and some number is missing in that series, we need to observe first and then find the accurate number to that series of numbers.

Following the note of arithmetical number series tricks and arithmetical number series questions and tricks that helps in qualifying the IBPS Clerk and IBPS PO thus getting a good score.

Also Read:  History of Computers Notes for Bank Exam

Types of number series

There are some format of  series:-

  1. Perfect squares.
  2. Perfect cubes.
  3.  AP(Arithmetic progression).
  4. GP(geometric Progression).

AP(Arithmetic progression).

 a_n = a_1 + (n - 1)d,
 a_n = a_m + (n - m)d.
where nth terms of sequences(an),ais first  term, d is the common difference.

GP(Geometric Progression).

This type of series are based on ascending or descending order of numbers and each successive number is obtain by multiplying or dividing the previous number with a fixed number.


where r is common ratio.

Questions & Answers


Question 1: Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?


Question 2: Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?


Question 3: Look at this series: 7, 10, 8, 11, 9, 12... What number should come next?

Question 4: Find out the wrong number in the series: 3, 8, 15, 24,34,48,63.


Question 5: Complete the series: 2, 5, 9, 19, 37…


Question 6: Find out the wrong one in the series 7, 8,18,57,228,1165,6996.


Question 7: Look at this series: F2, __, D8, C16, B32, ... What number should fill the blank?

Question 8: Look at this series: VI, 10, V, 11, __, 12, III, ... What number should fill the blank?


Question 9: Look at this series: J14, L16, __, P20, R22, ... What number should fill the



Question 10: 589245773, 89245773, 8924577, 924577, ?


Here this article is related to :-

  • number series notes
  • number series quiz
  • number series questions for ibps clerk
  • number series questions and answers for bank exams
Updated: September 2, 2016 — 7:19 am

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