6, 12, 21, ?, 48
33
38
40
45
Explanation:
The pattern is + 6, + 9, + 12, + 15, …..So, missing term = 21 + 12 = 33.
The pattern is + 6, + 9, + 12, + 15, …..So, missing term = 21 + 12 = 33.