Multiple choice general knowledge math & puzzles 99990000,999000,__,90,0 9900 9009 9990 9099 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The sequence follows a pattern of removing the last two digits and reducing the count of leading nines: 99990000 (8 digits), 999000 (6 digits), 9900 (4 digits), 90 (2 digits), 0. Each step removes one '9' and one '0' from the respective blocks.