MathDB
2012 Spring Team #1

Source:

March 20, 2022
number theory

Problem Statement

Let a,b,ca, b, c be positive integers. Suppose that (a+b)(a+c)=77(a + b)(a + c) = 77 and (a+b)(b+c)=56(a + b)(b + c) = 56. Find (a+c)(b+c)(a + c)(b + c).