What number is next in this series 5 7 11 19 35?

Answer 1

67

The pattern is that the numbers increase by the next power of two

5 + 2^1 = 7

7 + 2^2 = 11

11 + 2^3 = 19

19 + 2^4 = 35

Answer 2

Note the difference between each pair is doubled compared to the previous pair.

5 ; 7 = 2^1

7 ; 11 = 2^2

11 : 19 = 2^3

19 : 35 = 2^4

So 35 : x = 2^5 = 32

So 35 + 32 = 67 .