Instructions

What should come in place of the question mark (?) in the following number series ?

Question 193

9 41 57 65 69 ?

Solution

The series follows the pattern
9
9 + $$ 2^5$$ =41
41 + $$ 2^4$$ =57
57 + $$ 2^3$$ =65
65 + $$ 2^2$$ =69
69 +$$ 2^1$$ =71

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