Reasoning - Series Completion - Discussion

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Q.

3, 15, ?, 63, 99, 143  .                          
A. 24 B. 35
C. 45 D. 56

Answer: Option B
Explaination:

 


The terms of the given series are (22 - 1), (42 - 1),....., (82 - 1), (102 - 1), (122 - 1).
So, missing term = (62 - 1) - (36 - 1) = 35.


Discussion

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