Multiple choice general knowledge math & puzzles Look at this series: 544, 509, 474, 439, ... What number should come next? 404 414 420 445 Reveal answer Fill a bubble to check yourself A Correct answer Explanation This is a simple arithmetic progression decreasing by 35 each time: 544 - 35 = 509, 509 - 35 = 474, 474 - 35 = 439. Therefore, 439 - 35 = 404. Option B (414) would only subtract 25. Option C (420) is not part of this pattern.