Question 12

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 6, 21, 66, ?

Solution

The pattern followed is :

1 $$\times3+3$$ = 6

6 $$\times3+3$$ = 21

21 $$\times3+3$$ = 66

66 $$\times3+3$$ = 201

=> Ans - (B)


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