Aptitude - Odd Man Out and Series - Discussion

Find the odd man out.

14. 

3, 5, 7, 12, 17, 19

[A]. 19
[B]. 17
[C]. 5
[D]. 12

Answer: Option D

Explanation:

Each of the numbers is a prime number except 12.

Rakesh said: (Jul 15, 2011)  
The difference between the two nos following this series- 2, 2, 5, 5, . So the next no will be with the difference of 8 i.e. 25. So 19 is odd.

Amarjit said: (Aug 8, 2011)  
Rakesh is exactly true.

Satyavani said: (Aug 16, 2011)  
3,5,7,12,17,19
3,5,7,17,19 are odd numbers.
only 12 is even number.

Raghu Ram said: (Nov 22, 2011)  
12 is a composite number.

Harika said: (Jun 14, 2012)  
3, 5, 7, 17, 19 odd numbers.

12 is even number.

So the answer is 12.

Malar said: (Aug 21, 2012)  
Harika is exactly true....

Moses said: (Sep 7, 2012)  
True, becaus 3,5,7,19 odd numbers
12 is even number.

Priyanka said: (Jan 24, 2013)  
@Raghu.

What is composite number please explain?

Abinayak said: (Mar 1, 2013)  
Exactly answer identified in each number difference in 2 but 12 and 17 difference in 5. So answer is 12.

Sweta said: (Jul 19, 2013)  
We can also say that every number here is odd except 12.

Ramesh said: (Aug 7, 2013)  
3, 5, 7, 17, 19 odd numbers.

12 is even number.

Pavankumar said: (Sep 30, 2013)  
3, 5, 7, 17, 19, 12 in this 12 is even number, so the answer is 12.

Rajat said: (Oct 14, 2013)  
@Priyanka.

Non-prime numbers are composite numbers.

Santosh said: (Dec 10, 2013)  
Please anyone can explain what is prime number?

Abdul Rasheed said: (Jan 2, 2014)  
True, because 3, 5, 7, 19 odd numbers.

12 is even number.

Saviour said: (May 12, 2014)  
Find odd one please help 70 80 36 15 28 ?

Priya said: (May 25, 2014)  
3+2 = 5.
5+2 = 7.
7+5 = 12.
12+5 = 17.
19 +2 = 23.

Every answer is odd number so 12 is even.

Aiswarya said: (Sep 30, 2014)  
To be clear 12 is not a prime number because it is divisible by 9 and 1. Prime number is only divisible by 1 and it should not be multiple of any other number.

Pallav Sharma said: (Oct 16, 2014)  
Except 12 all other numbers are prime. So answer is 12.

Aparna Devi said: (Jan 21, 2015)  
Please anyone can explain what is prime number and what is composite number?

Suyash said: (Apr 3, 2015)  
Prime number is a number who has no factor except 1 and the number itself while composite number contain other factors leaving 1 and the number itself.

Sarmi said: (Jun 20, 2015)  
19, 5, 17 are odd & 12 is even so answer is 12.

Abhishek Sinha said: (Oct 1, 2015)  
12 is prime numbers.

Ben said: (Jan 29, 2016)  
12 is even number.

Ashraf Hashmi said: (Jan 31, 2016)  
12 is even number because it is divisible by 2, 3, 4, 6 (Prime number divisible by 1 and itself).

Abhi said: (May 26, 2016)  
All are odd numbers expect 12. So, here the odd man is 12.

Abdullah Almamun said: (Jul 20, 2016)  
Satyavani is exactly true.

Mobi said: (Jun 13, 2017)  
The series can follow 2, 5, 2, 5 (these being the difference between the two numbers).

So the series will be like 3 5 10 12 17 19. So 7 is the odd one out.

Adhiyan said: (Oct 16, 2017)  
The remainder for every other number is 1 except 12 hence 12 is the odd one.

3/2 = 1
5/2 = 1
7/2 = 1
12/2 = 0 this is right
17/2 = 1
19 / 2 = 1

Tony Stark said: (Nov 21, 2017)  
3+5 =7
7+5 =12
12+7= 19

Thus if form Fibbonaci series then odd one in series is 12 . 12 also be the answer.

Hari said: (Dec 13, 2018)  
All are odd numbers except 12.

Jmk said: (Jan 7, 2019)  
Yes, all are odd numbers without 12.

Saiteja said: (Jun 25, 2019)  
Yes, all are odd numbers except 12 so answer is 12.

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