Solution

159313

First name
Millie
School
Somersham primary
Country
Age
9

5.31>5.21
5.21<5.31
5.11<5.32
5.11<5.23
5.32>5.11
5.23>5.11
5.12<5.13
5.13>5.12
5.13<5.21
5.21>5.13
5.12<5.31
5.31>5.12
I know that I have got all the possibilities because I thought of all the ways starting with a 1, for example, and then swapped the numbers around. This way I know I have all of them.