Library / /28 of 57

, 2010

Number theory Difficulty 3.0 AMC 10/12 Prove it Canada

Determine all pairs of positive integers $(x, y)$ that satisfy the equation $x^2 - y^2 = 420$ .

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.