Instructions

Find out the missing terms of the series:

Question 110

1, 5, 9, 17, (.....), 37, 49

Solution

The pattern is: 

$$\ 1^2$$, $$\ 2^2+1$$, $$\ 3^2$$, $$\ 4^2+1$$, $$\ 5^2$$, and so on. Hence, the missing number shall be 25.

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