Question

Identify the term that will replace the ?

$1,5,13,25,41,?$

• A. $51$
• B. $57$
• C. $61$
• D. $63$

Answer 1

The correct option is C $61$

1, 5, 13, 25, 41, ?
The series follows: $+4,+4\times 1,+4\times 2,+4\times 3..$
Thus, the missing term is $41+4\times 5=61$