The task asks for:
- 2. The xth arithmetic number where x = 1,000 and x = 10,000.
- 3. How many arithmetic numbers <= x are composite.
But the xth arithmetic number is not <= x. (There are 782 composite arithmetic numbers less than or equal to 1361, but there are only 559 arithmetic numbers less than or equal to 1000.) --Rdm (talk) 22:32, 13 June 2022 (UTC)