Instructions

What will come in place of the question mark (?) in the given number series?

Question 87

5, 7, 17, 47, 115, ?

Solution

Numbers of the form $$(n + n^3)$$ are added.

5 $$+ 1 + 1^3$$ = 7

7 $$+ 2 + 2^3$$ = 17

17 $$+ 3 + 3^3$$ = 47

47 $$+ 4 + 4^3$$ = 115

115 $$+ 5 + 5^3$$ = 245

=> Ans - (B)

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