Burt Kaliski Jr. (@modulomathy) 3/8/12 7:21 AM #math trivia for #March8: #68 is both the sum of squares and the difference of squares. What are the squares? The sum of squares is 64+4, or 8^2+2^2. The difference is 324-256, or 18^2-16^2. General rule for the difference of squares: if an integer N can be expressed … Continue reading