Number pattern. 3,-6,12,4,20

Question

Number pattern.   Solution options given. 

13,14,6,16 

Answer 1

The pattern is:

3   + (-9) = -6

-6  +(18) = 12

12  +(-8) = 4

4    +(16) = 20

The next number is

20  +(-7) = 13

The one after that would be

13  +(14) = 27