Question 568527
Hints: 


8,11,14,17,20 -- adding 3 each time


1,16,81,256,625 -- 1 = 1^4, 16 = 2^4, 81 = 3^4, ...


5,15,45,135,405 -- multiplying by 3 each time


2,7,12,17,22 -- adding 9 each time


1,1/2,1/4,1/8,1/16 -- dividing by 2 each time