Instructions

In each of the following questions, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

Question 18

3, 8, 18, 35, ? , 98

Solution

Numbers of the form $$(n^2+1)$$ are added.

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

8 $$+(3^2+1)$$ = 18

18 $$+(4^2+1)$$ = 35

35 $$+(5^2+1)$$ = 61

61 $$+(6^2+1)$$ = 98

=> Ans - (A)

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3, 8, 18, 35, ? , 98

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