Aptitude - Odd Man Out and Series - Discussion

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Q.

231, 121, 363, 253, 284, 352, 374.  .                          
A. 121 B. 284
C. 374 D. None Of These

Answer: Option B
Explaination:

 


In each of the numbers add the first and the third digit to get the middle one except 284.




Discussion

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