Multiple choice general knowledge math & puzzles 5 , 6 , 8 , 11 , 12 , 14 , 17 , 18 , 20 , 23 , ? 26 24 27 25 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The series follows a repeating pattern of +1, +2, +3. Starting from 5: 5+1=6, 6+2=8, 8+3=11, 11+1=12, 12+2=14, 14+3=17, 17+1=18, 18+2=20, 20+3=23. The next step is +1, giving 23+1=24.