Aptitude - Odd Man Out and Series - Discussion

Find the odd man out.

6. 

1, 4, 9, 16, 23, 25, 36

[A]. 9
[B]. 23
[C]. 25
[D]. 36

Answer: Option B

Explanation:

Each of the numbers except 23, is perfect square.

Muthu said: (Apr 7, 2011)  
Expect 23 other num can be obtainted by mul by other number (without taking 1 in account).

Raghu said: (Sep 6, 2011)  
Each numbers should add with odd numbers, first number is 1 add with 3 we get 4 like wise we add 4 with 5, 9 with 7 etc.

23 is the odd man out.

Garima said: (Sep 15, 2011)  
I also took out the solution the way Mr.Raghu said.

Menaga said: (Sep 26, 2011)  
1,4,9,16,23,25,36.... question.

1*1,2*2,3*3,4*4,5*5,.... missed value 23..... the answer is 23.

Vijay said: (Jan 26, 2012)  
Thanks a lot raghu for the simple solution.

Chaitanya said: (May 13, 2012)  
23 cannot be divided by any other number . and can only be divided by itself .

Deepu said: (Jun 14, 2012)  
1*1=1.
2*2=4.
3*3=9.
4*4=16.
5*5=25.
6*6=36.

23 is prime number and it has no square root so that the answer is 23.

Vishnupriya said: (Jul 24, 2013)  
Except 23 other no. Can be obtained by squaring 1, 2, 3, 4. , 5 so, 23 is the answer.

Sandeep said: (Aug 4, 2013)  
Why can't it be 23?

The difference between them is odd and following a sequence like 3, 5, 7, 7, 9. So it can be 23 also I think.

Sikkanthar said: (Aug 28, 2013)  
1^2 + 2 ^2 + 3^2 + 4^2 + 5^2 + 6^2.

In this condition the values(series) is given.

Here 23 is unnecessary present here.

So 23 is the answer.

Santhu said: (Mar 19, 2014)  
1^2 = 1.
2^2 = 4.
3^2 = 9.
4^2 = 16.
5^2 = 25.
6^2 = 36.

BUT 23 IS NOT SQUARED.

Anshu said: (Aug 29, 2014)  
What to do in case, where two logics are correct.

Krishna said: (Sep 11, 2014)  
23 is the only prime number out of the given numbers.

P.S.Akshay said: (Dec 25, 2014)  
There is another way, guys!

1.
1+3 = 4.
4+5 = 9.
9+7 = 16.
16+9 = 25.

By adding consecutive odd numbers to the answer that you get above it we get this order. (23 is missed out so it is the odd one).

Shubham Gupta said: (Jan 30, 2015)  
23 is non divisible and else are divisible. So these are those questions that can be solved at first look.

Gopal said: (Feb 23, 2015)  
All series have different between two sequence digits and these number are like as- (3, 5, 7, 9, 11, 13,) odd numbers.

01.
3 04.
5 09.
7 16.
9 23 (It should be 25 number because of the difference.
11 36 between the odd numbers coming sequence).

Manikandan said: (Aug 21, 2015)  
1+3=4.

First and odd numbers add get 2nd number so 16+9=25 but answer non correct so there is in 23 that wrong answer 23.

Saranya said: (Jul 26, 2016)  
1 + 3 = 4,
4 + 5 = 9,
9 + 7 = 16,
16 + 9 = 28.

Ans + next odd number 16 + 9 = 28.

But here the answer is 23. so 23 is the wrong number.

Govind said: (Oct 5, 2016)  
@Saranya.

16 + 9 = 25.

Souvik Mallick said: (Jan 23, 2017)  
3 * 3 = 9
5 * 5 = 25
6 * 6 = 36
-*- = 23 -->odd.

Jasmin Shaik said: (Mar 6, 2017)  
I agree @Raghu.

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