Solution

39991

First name
Ava and Alfie
School
Tirlebrook
Country
Age
7

We created our own one:

The first 2 cards add up to 3.
The 2nd and 3rd cards add up to 7.
The 3rd and 4th cards add up to 19,
The 4th and 5th cards add up to 21.
The 5th and 6th cards add up to 22.
The 6th and 7th cards add up to 24.

We were surprised when we did this task with the class that it could be done 2 ways! (We soon realised there's only 2 ways this can be done because only 2 cards can equal 3.)