Due Wednesday, November 15:

1. Section 4.1 (page 244) #9
2. Section 4.1 (page 245) # 28
3. Compute the following:
   • 13569 mod 3
   • 13569 mod 5
   •  mod 11
4. Convert the following numbers from decimal to binary:
   • 111
   • 127
   • 128

Challenge: (Optional) Let a, b and c be any integers, and n > 1. Show that if (mod n) and (mod n), then (mod n).