Odd One Out and Series Based Questions Bank PO Exams

Odd One Out and Series Based Questions Bank PO Exams

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ODD ONE OUT & SERIES

In these type of questions, a set of numbers is given in such a way that all numbers except one satisfy a particular pattern.The one which does not satisfy the pattern that is followed is to be taken out & will be our answer.

Some important Number series:

1. Prime Number Series Eg: 2,3,5,7,11,……………..
2. Even Number Series Eg:2,4,6,8,10,12,…………
3. Odd Number Series: Eg: 1,3,5,7,9,11,……………
4. Perfect Square Series: Eg: 1,4,9,16,25,…………..
5. Perfect Cube Series: Eg: 1,8,27,64,125,…………

6.Arithmetic Progression (A.P) Series: Eg: 15,12,9,6,3…………….

7. Geometric Progression(G.P) Series: Eg: 192,48,12,3,…………..

Let us understand the concept of Odd One Out with the help of some examples:

Ques: Find the odd one out in the below series:

(i) 3,5,7,14,17,19

Sol: In the above series except 14 all numbers are odd numbers. So, 14 is the odd one.

(ii) 1,4,9,16,27,25,36

Sol: In the above series all numbers except 27 are perfect squares. So, 27 is the odd one.

(iii) 29,31,37,41,43,49

Sol: In the above series all numbers except 49 are prime numbers. So, 49 is the odd one.

For the  practice of Odd One Out, click on Online Bank Exam Preparation

(iv) 1,4,9,16,27,36,49

Sol: In the above series, all numbers except 27 are perfect squares. So 27 is the odd one.

(v) 1,8,27,64,81,125,216

Sol: In the above series, all numbers except 81 are perfect cubes. So, 81 is the odd one.

(vi) 30,42,56,72,90,114

Sol: The above series follows the pattern: 5*6,6*7,7*8,8*9,9*10,10*11

So it will be 30,42,56,72,90,110. So, 114 is the odd one.

(vii) 105,85,60,30,0,-45,-90

Sol: In the above series, subtract 20,25,30,35,40,45 from the terms.So, 0 is the odd one.

(viii) 10,14,28,32,64,68,132.

Sol: In the above series, alternatively add 4 and double the next term.So, 132 is the odd one.

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