Aptitude - Odd Man Out and Series - Discussion

Find the odd man out.

1. 

3, 5, 11, 14, 17, 21

[A]. 21
[B]. 17
[C]. 14
[D]. 3

Answer: Option C

Explanation:

Each of the numbers except 14 is an odd number.

The number '14' is the only EVEN number.


Vandna said: (Dec 4, 2010)  
Because 14 is the only even number and all others are odd numbers, so 14 is odd in the series of odd numbers.

Manjujain said: (Jan 19, 2011)  
3*2-1=5
5*2+1=11 so on..........
but 14 is odd no.

Jatin said: (Feb 23, 2011)  
Intelligent question & answer.

Rohit Kr Ray said: (Jul 26, 2011)  
If 21 was not given, then another explanation should have been, others are prime numbers except 14.

Vishal Kate said: (Nov 29, 2011)  
It has two type solution

1. All are odd no and 14 is a even no
2. All are prime but 14 is even if 21 is exclude.

Sravan Goud said: (Jun 30, 2012)  
Each of the number is a multiple of 3 but 28 is not dividable by 3.

Pethkar Shweta said: (Aug 19, 2012)  
All no's are odd but 14 is even so ans is 14.

Sonu said: (Jan 11, 2014)  
There is an integer which shows a very peculiar feature: no matter any number is subtracted from it, the result is always exactly divisible by successor of that number. What is the integer?

Harriet said: (Oct 11, 2014)  
14 is the only even number.

Sarah said: (Nov 3, 2014)  
14 is a composite rest of them are prime except 21 so we can say that 14 is even and all other are odd.

A.G.Rao said: (Apr 1, 2015)  
3, 5, 11, 17, 21 is a odd numbers and 14 is an even number.

But 14 divided in 2 two part of 7+7 = 14. 7 is a odd number.

Anupam said: (May 8, 2015)  
It can also be like this.

3+2 = 5, 5+6 = 11, 11+3 = 14, 14+7 = 21.

So according to this, 17 is "Find the odd number".

The first number is increased by 2 followed by an increase by 6. The next number is increased by 3 followed by an increase by 7 and so on.

Anonymous said: (Jul 29, 2015)  
14 is an even number.

Shivanna Bani said: (Aug 26, 2015)  
3, 5, 11, 14, 17,

Answer 21, 17, 14, 3,

How will got answer 14 this is wrong I think 21 is correct?

Birendra Giri said: (Jun 3, 2016)  
@Shivanna Bani.

14 is the correct answer.

How you got that numbers? Explain your answer.

Manav said: (Jul 1, 2016)  
Why its just because of odd and even, except 14 rest all are prime no. That can be an explanation of this answer just getting the answer is not the motive I would like to know whether I m correct in my way or not.

Topcoder said: (Jul 20, 2016)  
Option A.

Because : 3,
3 * 2 - 1 = 5.
3 * 4 - 1 = 11.
3 * 5 - 1 = 14.
3 * 6 - 1 = 17.
But 3 * 7 - 1 =20 So option A is correct.

Shambhu Chetry said: (Aug 30, 2016)  
The answer is 14. Because it is even number another all odd numbers.

Subha said: (Sep 30, 2016)  
3 + 8 = 11,
11 + 6 = 17,
17 + 4 = 21,
5 + 9 = 14,
14 + 7 = 21,
So the correct answer is 21.

Prem Kumar said: (Oct 2, 2016)  
Guys, please tell me correct answer is 14 or 21?

Prachiti said: (Dec 17, 2016)  
Here all numbers are prime except 14. Therefore 14 is the answer.

Gude.Anudeep said: (Jan 7, 2017)  
14 is even number except all numbers.

Venkatreddy said: (Feb 17, 2017)  
14 is the correct answer.

I too got the same answer.

Dhara said: (Mar 1, 2017)  
How? I cannot able to understand this question. Please help how this type of question are solved.

Vishal said: (Jul 18, 2017)  
Yes, I agree @Topcoder.

A is the correct answer.
Because:
3,
3 * 2 - 1 = 5.
3 * 4 - 1 = 11.
3 * 5 - 1 = 14.
3 * 6 - 1 = 17.
But
3 * 7 - 1 =20 So option A is correct.

Gogkul said: (Oct 4, 2017)  
14 is an even number.

Akshada said: (Nov 3, 2017)  
21 is also even no ?

Mallikharjunudu said: (Oct 6, 2018)  
Why not 21?

Princess said: (Apr 5, 2019)  
Why is co-prime no H.C.F is always 1?

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