# Odd Man Out Series Aptitude Questions and Answer – Quantitative Aptitude

Odd Man Out Series Aptitude Questions and Answer – Tips & Tricks

Points to Remember

1. Series: The sequence of numbers that obtained by some particular predefined rule is called series.
1. Odd Number / Prime Number / Even Number: The serious may consist of odd number/ Prime Number and Even Number except one number, Which will be the odd man out.
2. Perfect Squares / Cubes: These Series can be formed by squaring or cubing every successive number,
1. Squares: 9 , 16, 49, 81…
2. Cubes: 27, 64, 125, 216…
3. Arithmetic Series: An arithmetic series is one in which successive numbers are obtained by adding (or subtracting) a fixed number to the previous number.
4. Geometric Series: A Geometric Series is one in which each successive number is obtained by multiplying (or dividing) a fixed number any the previous number.
5. Cumulative Series: In this type, the third number is the addition of previous two numbers
• Example: 2, 4, 6, 10, 16, 26,….
6. Power Series: The terms are defined on the basis of powers of numbers, the number may be expressed in the form of n3 – n.
7. Mixed Series: A mixed series means a series which is created according to any non-conventional rule.
1. Two-tier Arithmetic Series: It is one in which the difference of successive numbers themselves form an arithmetic series.
2. Three-tier Arithmetic Series: It is difference of successive number forms a two-tier arithmetic series, whose successive term’s differences, in turn, create an arithmetic series.
3. Arithmetic Series: In this, each successive term should e found by first adding a fixed number to the previous term and then multiplying it by another fixed number.
4. Geometric Arithmetic Series: In this series, one in which each successive term is found by first multiplying / dividing the previous term by a fixed number and then adding or deducting another fixed number.
5. Twin Series: In this, Two serious are packed in one.

Odd Man Out Series Aptitude Questions and Answer With Detailed ExplanationQuantitative Aptitude

## Odd Man out and Series

 Question 1
6, 9, 15, 21, 24, 28, 30
 A 21 B 24 C 28 D 30
Question 1 Explanation:
Explanation:
Each of the number except 28, is a multiple of 3.
 Question 2
3, 5, 7, 12, 17, 19
 A 19 B 17 C 5 D 12
Question 2 Explanation:
Explanation:
Each of the numbers is a prime number except 12.
 Question 3
331, 482, 551, 263, 383, 362, 284
 A 262 B 383 C 331 D 551
Question 3 Explanation:
Explanation:
In each number except 383, the product of first and third digits is the middle one.
 Question 4
Find the odd man out 2, 5, 10, 17, 26, 37, 50, 64
 A 50 B 37 C 26 D 64
Question 4 Explanation:
Explanation:
(1 * 1) + 1 , (2 * 2) + 1, (3 * 3) + 1, (4 * 4) + 1, (5 * 5) + 1, (6 * 6) + 1, (7 * 7) + 1, (8 * 8) + 1
But, 64 is out of pattern.
 Question 5
Insert the missing number.
8, 7, 11, 12, 14, 17, 17, 22, (....)
 A 20 B 22 C 24 D 27
Question 5 Explanation:
Explanation:
There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22) increasing by 3 and 5 respectively.
 Question 6
Find the next number in the given series? 5, 25, 61, 113,....
 A 142 B 181 C 156 D 179
Question 6 Explanation:
Explanation:
Here the series follow the rule that
12 + 22 = 5
32 + 42 = 25
52 + 62 = 61
72 + 82 = 113
So, Next is 92 + 102 = 181
 Question 7
Find the missing number in the given series?
2, 3, 6, 15, ?, 157.5
 A 87 B 78.5 C 56.5 D 45
Question 7 Explanation:
Explanation:
The given,
2, 3, 6, 15, ?, 157.5
2 * 1.5 = 3
3 * 2 = 6
6 * 2.5 = 15
15 * 3 = 45
45 * 3.5 = 157.5
Therefore, the missing number is 45
 Question 8
Find out the wrong number in the given sequence of numbers.
56, 72, 90, 110, 132, 150
 A 72 B 110 C 132 D 150
Question 8 Explanation:
Explanation:
The numbers are 7*8 , 8*9, 9*10, 10*11, 11*12, 12*13
So, 150 is wrong
 Question 9
Find the odd one out?
 A Hawk B Parrot C Owl D Eagle
Question 9 Explanation:
Explanation:
All except Parrot are birds of prey.
 Question 10
Find out the wrong number in the given sequence of numbers.
36, 54, 18, 27, 9, 18.5, 4.5
 A 4.5 B 18.5 C 54 D 18
Question 10 Explanation: