Question

Can someone please help me ASAP?!
3,_,9,_,_,_,_,_,_,21

Answer 1

6,12,15,18,21,24,27,30,33,36

Explanation:

Answer 2

3,6,9,12,15,18,21

Explanation:

These are the multiples of 3.

You continue to add 3 to the following number.

Hope this helps! :)