Answer:
33
Step-by-step explanation:
to get from 2 to 3 you add 1
to get from 3 to 5 you add 2
to get from 5 to 9 you add 4
to get from 9 to 17 you add 8
as you can see the numbers are doubling each time you add on
to get the next number double 8 = (8 × 2) = 16
so now 17 + 16 = 33
the next number is 33
