Question

Create a set of numbers and call the set N. Describe a subset of N and explain why it is a subset of N.

Answer 1

Set B can be all real numbers,
Set A can be all real even numbers.

Answer 2

Set A is by definition a subset of Set B because elements of set B (namely odd numbers) do not appear in Set A. However all of Set A's elements are also part of Set B. So by definition Set A is a subset of Set B