Question 20
Fill the three blanks in each sequence (a)–(h). Give all eight answers and explain the patterns. Use the simple arithmetic or interleaving patterns suggested by the terms; a finite list alone can have other continuations.
(a) 1, 5, 9, 13, __, __, __
(b) 3, 6, 11, 18, 27, __, __, __
(c) 1, 3, 9, 27, __, __, __
(d) 4, 9, 19, 39, 79, __, __, __
(e) 1, 2, 3, 5, 8, 13, __, __, __
(f) 1, 1, 1, 1, 4, 7, 13, __, __, __
(g) 0, 77, 7, 71, 14, 65, __, __, __
(h) 1, 20, 3, 18, 5, 16, __, __, __
(a) 1, 5, 9, 13, __, __, __
(b) 3, 6, 11, 18, 27, __, __, __
(c) 1, 3, 9, 27, __, __, __
(d) 4, 9, 19, 39, 79, __, __, __
(e) 1, 2, 3, 5, 8, 13, __, __, __
(f) 1, 1, 1, 1, 4, 7, 13, __, __, __
(g) 0, 77, 7, 71, 14, 65, __, __, __
(h) 1, 20, 3, 18, 5, 16, __, __, __