36541

First, I worked out 14 and 3 because there are only two answers for these (14=9+5 and 8+6 and 3=3+0 and 1+2). I used 3+0 and 8+6. This is because if you use 3 or 0 in the other sums, then the others will turn out wrong. Then, I used 8+6 for 14 because I used the 9 when I calculated 13 because I eliminated the other two possible calculations, the other solutions I made eventually became wrong, somehow. Then, there was 7,0,5 and 3. I used 7+0 for 7 and 5+3 for eight so then I had used all of the numbers