# Aptitude - Odd Man Out and Series - Discussion

### 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

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

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.