1. The problem statement, all variables and given/known data If 5 divides m^2 + n^2 + p^2 , prove that 5 divides wither m, or n, or p. 2. Relevant equations m,n,p are all integers 3. The attempt at a solution I am having some major problems with this chapter on modular arithmetic. any help is much appreciated!!! modular arithmetic is not needed to solve the problem, but may be helpful.