Sequences are based off of the directions, if it is least to greatest it is the smallest number, if you can't figure it out it is the farthest on the left of a number line the the farthest on the tight. If it is greatest to least, it is the biggest number first and the smallest last, if you can't figure that out it is the farthest on the right to the farthest on the left.
1. It is adding 5 each time so the next two are 31,36
2. Same thing 28,33
All you have to do is find the sequence I between them. Hope this helps!