Solution

159541

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

I found the square numbers up to 20 then you find the prime numbers up to 400 by seeing if the number doesn't go into 2,3,4,5,6,7,8,9,10 and 11 then add the prime numbers together to make the square numbers.