Multiple choice Find the next number in the series: 1, 8, 9, 64, 25, 216, 49, 512 ? 80 729 81 1024 720 Reveal answer Fill a bubble to check yourself C Correct answer Explanation The series is formed as : 12,23, 32, 43, 52, 63, 72,83, 92 and so on, i.e., taking the square and cube of odd and even numbers respectively.