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Aptitude - Odd Man Out and Series - Discussion

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"Everything should be made as simple as possible, but not simpler."
- Albert Einstein

Find the odd man out.

5. 

6, 9, 15, 21, 24, 28, 30

[A]. 28[B]. 21
[C]. 24[D]. 30

Answer: Option D

Explanation:

Each of the numbers except 28, is a multiple of 3.


Kousik said: (Fri, Jul 8, 2011 01:47:28 PM)    
 
Each of the numbers except 28, is a multiple of 3.

Anil said: (Sat, Oct 15, 2011 02:15:20 AM)    
 
28, 24, 30 are devisible by 2 only 21 is not divisible by 2. So, why answer is 28 and why not 21?

Swati said: (Mon, Oct 24, 2011 11:25:02 PM)    
 
Yes I had confused about this question because each digit divisible by 2 but 21 is only digit its'nt divisible by 2, so the answer is 21 not 28.

Richa Aggarwal said: (Tue, Nov 8, 2011 03:45:26 PM)    
 
All the numbers are divided by 3 but 28 is not.

Rama Krishna Rao said: (Tue, Dec 6, 2011 07:26:33 AM)    
 
Here it is a number series 3 is added to first number and 6 is added to next two numbers
6+3=9
9+6=15
15+6=21
21+3=24
24+6=30

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