Solution

Dicey Operations Avyu

First name
Avyu
School
Banstead Prep School
Country
Age
11

I decided where to put my digits by starting in the hundreds going down to the ones.

My strategy was making sure the 100s column adds up to 9 and the other columns 10 or close to it because it will make the number close to 1000.

The closest I got was 1006 with: 8,2,4,1,6,2,0,2,0, working below.