It rings at these times: 1. 12:00 2. 12:01 3. 12:02 4. 12:03 5. 12:04 6. 12:05 7. 12:06 8. 12:07 9. 12:08 10. 12:09 11. 12:10 12. 12:11 13. 12:12 14. 12:13 15. 12:14 16. 12:15 Answer: 16 times. Edwin