Multiple choice general knowledge math & puzzles 1-4-6-8-9-10-12-? 13 14 15 16 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The sequence consists of composite numbers (numbers with more than two factors): 4, 6, 8, 9, 10, 12. The next composite number after 12 is 14. 13 is a prime number and therefore excluded.