2, 5, 11, 23, ?

Solution

The pattern followed is that numbers of the form $$(3\times2^n)$$ are added.

2 $$+(3\times2^0)$$ = 5

5 $$+(3\times2^1)$$ = 11

11 $$+(3\times2^2)$$ = 23

23 $$+(3\times2^3)$$ = 47

=> Ans - (A)

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