list the set of: counting numbers from 20 to 30

To list the set of counting numbers from 20 to 30, we start with the number 20 and then continue counting one by one until we reach 30. Here is the set you requested:

{20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30}

To obtain this set, you simply need to follow these steps:

Step 1: Start with the number 20.
Step 2: Add 1 to the previous number to get the next number in the set.
Step 3: Repeat step 2 until you reach the number 30.

By following these steps, you will be able to generate the complete set of counting numbers from 20 to 30.