Find The Next Number In The Series 1, 3 ,7 ,13 ,21 ,31? – InterviewSolution

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1.

Find The Next Number In The Series 1, 3 ,7 ,13 ,21 ,31?

Answer»

k(n) = k(n-1) +2(n-1) with

k(1) =1

k(7) =k(6) +2(7-1)

k(7) =31 +2*6

k(7) =31+12

k(7) =43

k(n) = k(n-1) +2(n-1) with

k(1) =1

k(7) =k(6) +2(7-1)

k(7) =31 +2*6

k(7) =31+12

k(7) =43

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