Number Theory Divisibility and Primes

www2.math.uconn.edu

ciphers and was used by Julius Casar. Each let-ter in a message is simply replaced by the letter coming three letters after it in the alphabet. Obvious problem: What about x, y and z? Obvious solution: Replace them with a, b and c. We may make this somewhat quantitative by assigning a numerical value to each letter: 0 to A, 1 to B, 2 to C ...

  Julius, Sacra, Julius casar