Multiple choice general knowledge math & puzzles 2,6,12,?,30 12 24 18 20 Reveal answer Fill a bubble to check yourself D Correct answer Explanation The sequence follows the pattern n^2 + n: 1^2+1=2, 2^2+2=6, 3^2+3=12, 4^2+4=20, 5^2+5=30. Alternatively, the differences are +4, +6, +8, +10. Both methods lead to 20.