Tricks to solve Number Series problems in bank PO Exams

Hi sir I am preparing for the bank completion exam please gibe me some trick to solve Number Series problems and question which help to understand the theorem of the same?

[sumit]

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 be find out

There are mainly four type of problem consider in number sreies

1. Numbers are prime even or odd.
2. Numbers are perfect squares or cubes.
3. Numbers has a particular divisibility.
4. Numbers are succeeding by some additions or subtraction or multiplications or divisions by a particular number or addition of their cubes and squares.


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 be find out

there are mainly foiur type of problem consider in number sreies

1. numbers are prime,even or odd.
2. numbers are perfect squares or cubes.
3. numbers has a particular divisibility.
4. numbers are succeeding by some additions or subtraction or multiplications or divisions by a particular number or addition of their cubes and squares.


Type I :

In this kind of inquiries, a series of numbers is given with one number missing represented by a question mark.

Q 30, 34, 43, 59, 84, 120,?

(1) 169
(2) 148
(3) 153
(4) 176
(5) None of these
Solution: (1) The given pattern is:
+22, 32, +42, + 62, +72
So, missing term is 169=120 +72

Q 40, 54, 82, ?, 180 ,250
(1) 142
(2) 124
(3) 136
(4) 163
(5) None of these

Solution: (2) The pattern is: +14, + 28, + 42, + 52, + 70
So, missing term is 82 + 42=124


Type 2 :- In this we are given a sequence of number. Whole sequence, except the odd number follow a certain rule.

Q 0, 1,3,8,18,35,264
(1) 62
(2) 35
(3) 18
(4) 8
(5) None of these
Solution: (1) The pattern is +(02+1), +(12+1), + (22+1) ,+ (32+1), + (42+1), + (52+1)
So, 62 is wrong and must be replaced by 35 + (52+1) = 62

Q 1, 9, 125, 49, 729, 121, 2147
(1) 2147
(2) 729
(3) 125
(4) 1
(5) None of these
Solution: (1)


Problem On Type Of Question


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.

1) 5531 5506 5425 5304 5135 4910 4621
(1) 5531
(2) 5425
(3) 4621
(4) 5135
(5) 5506

2) 6 7 9 13 26 37 69
(1) 7
(2) 26
(3) 69
(4) 37
(5) 9

3) 1 3 10 36 152 760 4632
(1) 3
(2) 36
(3) 4632
(4) 760
(5) 152

4) 4 3 9 34 96 219 435
(1) 4
(2) 9
(3) 34
(4) 435
(5) 219

5) 157.5 45 15 6 3 2 1
(1) 1
(2) 2
(3) 6
(4) 157.5
(5) 45