Instructions

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

Question 64

4, 19, 49, ?, 229

Solution

The pattern is

4 + $$15 \times 2^0$$ = 19

19 + $$15 \times 2^1$$ = 49

49 + $$15 \times 2^2$$ = 109

109 + $$15 \times 2^3$$ = 229

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