Solution

195706

First name
Y5
School
Pool-in-Wharfedale
Age
10

When you choose your number for example 7 and add 9 it will always begin with a 1 and since you added a 9 it will be one less than your original number like 5 add 9 it will be 14 one less than 5 so when you split your numbers up and add them 1 add to 1 less than your number will be your original number