Aptitude - Odd Man Out and Series - Discussion

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

2. 

22, 33, 66, 99, 121, 279, 594

[A]. 33
[B]. 121
[C]. 279
[D]. 594

Answer: Option C

Explanation:

Each of the number except 279 is a multiple of 11.

Sankar Prasanna Ghosh said: (Sep 25, 2011)  
If we consider (022, 033, 066, 099, 121, 279, 594) , then we see middle term sum of (1st & 3rd) term. Except 279.

Sonutalwani said: (Jun 29, 2012)  
11*2=22.

11*3=33.

11*6=66.

11*9=99.

11*11=121.

11*54=594.

279 is not divided by 11.

Srinu said: (Dec 25, 2014)  
Is there any reason to multiply with 11?

If we multiply with 3 means the answer is 121.

Sureshkumar said: (Jan 21, 2015)  
Don't confused if add 1st and 3rd number we get middle number. So 279 is except from that then answer is 279.

Mit Parikh said: (Jul 14, 2015)  
Very nice.

Aanchal said: (Jan 6, 2016)  
From 3rd no, every number is three times previous-to-previous number.

Eg: 66 is thrice 22, 99 is thrice 33.

So, answer could also be 121 (198 should come instead).

Vishal said: (Aug 26, 2016)  
But if u do like this :

22 * 3 = 66,
33 * 3 = 99,
66 * 3 = 198 but in problem 121 (Ans),
198 * 3 = 594,
99 * 3 = 279.

Kartik said: (Mar 5, 2017)  
11, 33, 36, 108, 110, 333.

Find the odd man out.

Mahesh said: (Jul 14, 2017)  
Answer is 11.

33 = 3*11
36= 3*12
108= 3*36
110=11*10
333=3*111.

Only 11 is a prime number.

Harikrishna said: (May 16, 2018)  
The simple solution is;

11*2=22,
11*3=33,
11*6=66,
11*9=99,
11*11=121,
11*54=594.

(eg:11*54= 594(take the middle number out (5-*9*-4)of any three digit answer then you can find the same number which is multiplied by the number 11)).

the same way other can be done.

Urman said: (Jun 16, 2018)  
11*2=22.
11*3=33.
11*6=66.
11*9=99.
11*11=121.
11*54=594.

279 is not divided by 11.

Nandini said: (Oct 5, 2018)  
@Kartika answer will be 110.

11*3=33.
33+3=36.
36*3=108.
108+3=111(110 which is wrong).
111*3=333.

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