[Just for fun] If a^2+b^2=c^2, where a, b and c are positive integers. Prove that among a, b and c, at least one of them is divisible by 3. 🤓🙋🏻 Tags: divisible by 3 4 comments 8 likes 0 shares Share this: 史丹福狂想曲 About author 5816 followers 5189 likes "http://drstanford.blogspot.hk/" View all posts