Lattice Points on a Circle
How many points $(x, y)$ with integer coordinates (positive, negative or zero) lie on the circle $x^2 + y^2 = 325$? Give an integer.
Related problems & prerequisites
Worth solving first
- Trailing Zeros 3.0/10
Source: Counting representations as sums of two squares via the Jacobi two-square theorem; standard number theory. Statement written for AxiomIQ.