Question

What are the next three terms of this sequence? (see picture)

Answer 1

3, 12, 27,48, 75, 108, 147

Explanation:

12-3 = 9

27-12 = 15 (9+6)

48-27 = 21 (15+6)

75-48 = 27 (21+6)

108-75 = 33 (27+6)

147-108 = 39 (33+6)