Start by finding the pattern. To get from 72 to 61, you are subtracting 11. To get from 61 to 50, you are subtracting 11.
Therefore, start with the final number 28. Subtract 11 from this and you get 17. Subtract 11 from 17 and you get 6.
Therefore, the next two terms are
17, 6
Hope this helps!!
If you need any more explanation just let me know in the comments and I’ll get back to you ASAP :)
