Multiple choice general knowledge math & puzzles Which number should come next in this series? 25,24,22,19,15 4 5 10 14 Reveal answer Fill a bubble to check yourself C Correct answer Explanation The pattern decreases by consecutive integers: 25-1=24, 24-2=22, 22-3=19, 19-4=15. Following this pattern, the next subtraction is 5, so 15-5=10. This is a classic arithmetic progression with increasing differences.