Aptitude - Odd Man Out and Series - Discussion

Find out the wrong number in the given sequence of numbers.

10. 

125, 127, 130, 135, 142, 153, 165

[A]. 130
[B]. 142
[C]. 153
[D]. 165

Answer: Option D

Explanation:

Prime numbers 2, 3, 5, 7, 11, 13 are to be added successively.

So, 165 is wrong.


Birupaksha Pal said: (Dec 3, 2010)  
The number 127 is a prime so can also be treated as the odd one of the series

Kanu said: (Sep 18, 2011)  
I have stil not understand. Anybody help me to clear it.

Jyoti said: (Sep 23, 2011)  
Kanu we are adding prime nos successively like 2, 3, 5, 7, 11 and no shoud be 13 not 12, b'coz 12 is not a prime no thats why 165 is a wrong no.

Rakesh Meshram said: (Feb 17, 2013)  
125+2=127
127+3=130
130+5=135
135+7=142
142+11=153
153+13=166 but 165 is not a correct.

So 165 is wrong answer.

Venkatareddy said: (Feb 11, 2014)  
How we can know adding prime numbers only?

Lavanyakrishna said: (Jul 26, 2015)  
Difference between successive numbers is in prime numbers increasing order such as 2, 3, 5, 7, 11, 13. Wrong number is 165.

Hari said: (Jul 31, 2015)  
The difference b/w each only prime numbers i, e; 2, 3, 5, 7, 11, 13, 17, 19, 23 etc, but in:

125+2=127.
127+3=130.
130+5=135.
135+7=142.
142+11=153.
153+13=166.

But 165 is not a correct. So select 169.

Kanhaiya Jha said: (Sep 3, 2016)  
As per my logic, 153 will be the correct answer.

Manju Babar said: (Aug 26, 2017)  
How? @Kanhaiya.

Nikhil Panwar said: (May 29, 2018)  
Since, 127 is a prime number so take it out.

Chekka Nageswararao said: (Nov 1, 2019)  
9 is prime number so how can 11.

Dipesh said: (Nov 5, 2019)  
@Chekka 9 is not prime it is divisible by 3.

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