Multiple choice general knowledge math & puzzles Look at this series: 2, 6, 18, 54, ... What number should come next? 108 148 162 216 Reveal answer Fill a bubble to check yourself C Correct answer Explanation This is a geometric progression where each number is multiplied by 3 to get the next number: 2 * 3 = 6; 6 * 3 = 18; 18 * 3 = 54. Therefore, 54 * 3 = 162.