Problem
First name
Year 6
School
Westhouses, nr Alfreton
Country
Age
11
I found the missing number was 21. I worked it out by adding 28,30,18 and
20 which is 96 so we thought that the other side might have to 96 as well.
So we added 30,23,22 which made 75 and 96 - 75= 21.