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

**Points to Remember**

**Series:**The sequence of numbers that obtained by some particular predefined rule is called series.**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.**Perfect Squares / Cubes:**These Series can be formed by squaring or cubing every successive number,- Squares: 9 , 16, 49, 81…
- Cubes: 27, 64, 125, 216…

**Arithmetic Series:**An arithmetic series is one in which successive numbers are obtained by adding (or subtracting) a fixed number to the previous number.**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.**Cumulative Series:**In this type, the third number is the addition of previous two numbers- Example: 2, 4, 6, 10, 16, 26,….

**Power Series:**The terms are defined on the basis of powers of numbers, the number may be expressed in the form of n^{3}– n.- Mixed Series: A mixed series means a series which is created according to any non-conventional rule.
**Two-tier Arithmetic Series:**It is one in which the difference of successive numbers themselves form an arithmetic series.**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.**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.**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.**Twin Series:**In this, Two serious are packed in one.

Odd Man Out Series Aptitude Questions and Answer **With Detailed Explanation** – Quantitative Aptitude

## Odd Man out and Series

Question 1 |

6, 9, 15, 21, 24, 28, 30

21 | |

24 | |

28 | |

30 |

Question 1 Explanation:

**Answer: Option C**

__Explanation:__

Each of the number except 28, is a multiple of 3.

Question 2 |

3, 5, 7, 12, 17, 19

19 | |

17 | |

5 | |

12 |

Question 2 Explanation:

**Answer: Option D**

__Explanation:__

Each of the numbers is a prime number except 12.

Question 3 |

331, 482, 551, 263, 383, 362, 284

262 | |

383 | |

331 | |

551 |

Question 3 Explanation:

**Answer: Option B**

__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

50 | |

37 | |

26 | |

64 |

Question 4 Explanation:

**Answer: Option D**

__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, (....)

8, 7, 11, 12, 14, 17, 17, 22, (....)

20 | |

22 | |

24 | |

27 |

Question 5 Explanation:

**Answer: Option A**

__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,....

142 | |

181 | |

156 | |

179 |

Question 6 Explanation:

**Answer: Option B**

__Explanation:__

Here the series follow the rule that

1

^{2}+ 2

^{2}= 5

3

^{2}+ 4

^{2}= 25

5

^{2}+ 6

^{2}= 61

7

^{2}+ 8

^{2}= 113

**So, Next is 9**

^{2}+ 10^{2}= 181Question 7 |

Find the missing number in the given series?

2, 3, 6, 15, ?, 157.5

2, 3, 6, 15, ?, 157.5

87 | |

78.5 | |

56.5 | |

45 |

Question 7 Explanation:

**Answer: Option D**

__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

56, 72, 90, 110, 132, 150

72 | |

110 | |

132 | |

150 |

Question 8 Explanation:

**Answer: Option D**

__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?

Hawk | |

Parrot | |

Owl | |

Eagle |

Question 9 Explanation:

**Answer: Option C**

__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

36, 54, 18, 27, 9, 18.5, 4.5

4.5 | |

18.5 | |

54 | |

18 |

Question 10 Explanation:

**Answer: Option B**

__Explanation:__

The terms are alternatively multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.

There are 10 questions to complete.