195733

To find the answers to this problem, I started off by using trial and error to find a couple of solutions. When I had done that I found a pattern within them showing that the top row has to add up to 9 as well as the first column down. The bottom row and the right hand column each have to add up to 10. Once I figured that out, I went through all the possible answers. I found 9 answers using this logic, as shown in the 'Adding to 200' file attached.