Instructions

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

Question 149

11, 23, 47, 95,191, ?

Solution

Each number is multiplied by 2 and then 1 is added to them.

11 $$\times 2 + 1$$ = 23

23 $$\times 2 + 1$$ = 47

47 $$\times 2 + 1$$ = 95

95 $$\times 2 + 1$$ = 191

191 $$\times 2 + 1$$ = 383

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