Discussion :: Odd Man Out and Series  Odd Man Out (Q.No.6)
Find the odd man out.
6.  1, 4, 9, 16, 23, 25, 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. 
Suresh said: (Nov 30, 2019)  
That's really correct that 23 is not multiplied by any number, except 1*23 or 23*1. 
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