Multiple choice general knowledge math & puzzles 5 , 4 , 20 , 7 , 2 , 14 , 3 , 6 , ? 9 18 24 19 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The series consists of triplets where adjacent numbers multiply to give the third: 5×4=20, 7×2=14, 3×6=18. The pattern is (first number) × (second number) = (third number).