Problem
First name
Year 11
School
Sandbach High School
Country
Age
15
Problem 1: Olivia Mackie, Liberty Hughes,Emma Stephen,Sophie Barwick,
The numbers are 12,24,36,48 We spotted that B=2A.
The proved it.....
10A+B=4(A+B)
10A+B=4A+4B
6A=3B
Hence
2A=B
B must be in the range 1 to 9 so the only solutions are when A=1,2,3 or 4.