Solution

159539

Problem
Two Primes Make One Square Back to problem
First name
Jack
School
Norwich Lower School
Country
England
Age
10

I found that if you list the Prime Numbers and the Square Numbers you can find ? add ? equals ?. If you draw it out you can add the numbers and see if they match.

Prime Square
1 1
2 4
3 9
5 16
7 25
11 36
13 49
17 64
19 81