Question

find the next number in the series 1,2,9,65, _
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Answer 1

Explanation:

I hope this helps you. !!

Answer 2

The series 2,9,28,65,_,217 is (N^3+1) where N starts from 1.

(1^3)+1 = 1+1 =2

(2^3)+1 = 8+1 =9

(3^3)+1 = 27+1 =28

(4^3)+1 = 64+1 =65

(5^3)+1 = 125+1 =126

(6^3)+1 = 216+1 =217

So the missing number is 5^3+1 = 125+1 = 126.

hope it was clear enough...