Problem
1. Distinguish between Z and Z„. Which set can have negative integers'? Flow can we map an integer in Z to an integer in Z?
2. List four properties of divisibility discussed in this chapter. Give an integer with only one divisor. Give an integer with only two divisors. Give an integer with more than two divisors.
3. Define the greatest common divisor of two integers. Which algorithm can effectively find the greatest common divisor?