Solution

159129

First name
Zach
School
Ravensworth C.E Primary school
Country
Age
10

Start with the highest domino and put a smaller number next to it. When you found out what number the top line makes try to make it on all of the other rows. If you cannot make the same number try again with the biggest domino on the top and another smaller one next to it and work out the total then try to make it again. If you still don't have the answer then try once more then you should have the answer.