Number Series – This article provides you about how number series questions are coming in reasoning and maths exam. A sample of number series test, Math shortcut tricks & techniques.
A series is an informally speaking of numbers. It is the sum of the terms of a sequence. Finite terms and series are defined by first and last terms while infinite series is endless. Number series is a form of series in which particular numbers are present in a particular order and missing numbers are to find out, nowadays number series is an important part of each and every government exams, especially in banks. It acquires a high weight.
A series is solved by particular number series tricks, formulas, attitudes of a person. There are various types of series present in the exam. Series can be of many types of Numbers like Natural numbers, Whole numbers, Contagious numbers etc. A sequence is described as a list of elements with a particular order.
There are multiple types of number series available –
Number Series puzzles can be solved by various tricks provided by mathematics.
Firstly check the direct formulas as in like check
Ans. As talked about over the number series problems are solved by some particular number series rules applied logically.There are various methods to solve number series like predict the next number ii.e which number will come next by applying rules like by adding, subtracting etc. or by applying various shortcut tricks.
What Types of questions asked in bank exams related to number series?
Ans. There are various types of questions asked in bank exams:-
Type I: In this kind of inquiries, a series of numbers is given with one number missing represented by a question mark. The Candidate has to select from the options available to correct option in place of the question mark.
The given sequences of numbers will be such that every number takes after its predecessor in the same way, i.e., according to a particular pattern. Hopefuls are required to figure out the right ways in which the sequence is formed and thereafter find out the number to finish the arrangement.
Type 2 – In this we are given a sequence of number. The whole sequence, except the odd number, follow a certain rule. You need to search that number which does not follow the rule.
Some of the questions asked in number series previous papers –
Directions: (1-5) In each of these questions a number series is given. In each series stand out number isn’t right. Discover the wrong number. (IBPS CWE PO/MT Exam 2012)
What is Number Series ?
Number series is a form of numbers in a certain sequence, where some numbers are mistakenly put 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.
Anything we learn in our school days was basics and that is well enough for passing our school exams. Now the time has come to learn for our competitive exams. For this we need our basics but also we have to learn something new. That’s where shortcut tricks come into action.
In competitive exams, number series are given and where you need to find missing numbers and mistakenly put into the series numbers. The number series come in different types. At first you have to decided what type of series are given in papers then according with this you have to use shortcut tricks as fast as you can.
Different types of Number Series
There are some format of series which are given in Exams.
Perfect Square Series:
This Types of Series are based on square of a number which is in same order and one square number is missing in that given series.
Example 1: 841, ?, 2401, 3481, 4761
Answer : 292, 392, 492, 592, 692
Example 2: 1, 9, 25, ?, 81, 121
Answer : 12, 32, 52, 72, 92, 112
Example 3: 289, 225, 169, ?, 81
Answer: 172, 152, 132, 112, 92
Perfect Cube Series:
This Types of Series are based on cube of a number which is in same order and one cube number is missing in that given series.
Example 1: 3375, ?, 24389, 46656, 79507
Answer : 153, 223, 293, 363, 433
(Each cube digit added with seven to become next cube number)
Example 2: 729, 6859, 24389, ?, 117649, 205379
Answer : 93, 193, 293, 393, 493, 593
Example 3: 1000, 8000, 27000, 64000, ?
Answer: 103, 203, 303, 403, 503
This type of series are based on ration series, where sequences are in form of ratio of difference between the numbers. All numbers are arranged in ratio sequence order.
This type of series are based on ascending or descending sequence of numbers and each continuous number is obtained by multiplying or dividing the preceding number with static number.
Example 1: 3, ?, 45, 144, 585
Answer : 3 x 0 +9 = 9, 9 x 1 + 9 = 18, 18 x 2 + 9 = 45, 45 x 3 + 9 = 144, 144 x 4 + 9 = 585.
Examples 2: 5, 45, 405, 3645, ?
Answer: 5 x 9 = 45, 45 x 9 = 405, 405 x 9 = 3645, 3645 x 9 = 32805.
Examples 3: 73205, 6655, 605, 55, ?
Answer: 5 x 11 = 55, 55 x 11 = 605, 605 x 11 = 6655, 6655 x 11 = 73205.
Two stage Type Series:
A two stage Arithmetic series is one in which the formation of arithmetic series are obtained from differences of continuous numbers themselves.
Example 1: i. 3, 9, 18, 35, 58,......
ii. 6, 9, 17, 23,......
This type of series has more then one different order are given, which has arranged in alternatively in a single series.This mixed series Examples are described separately.