Question 6
Find the missing numbers.
(a) 21, 27, 33, 39, ( ), 51, ( ), …
(b) 0, 3, 9, 18, 30, ( ), 63, …
(c) 1, 4, 9, ( ), 25, ( ), …
(d) 2, 6, 12, ( ), ( ), …
(e) 11, 88, 16, 80, 21, 72, ( ), ( ), …
Answer entry: enter all nine blanks in order: (a) two, (b) one, (c) two, (d) two, (e) two, separated by semicolons.
**Editorial input note:** Use no spaces before or after semicolons.
(a) 21, 27, 33, 39, ( ), 51, ( ), …
(b) 0, 3, 9, 18, 30, ( ), 63, …
(c) 1, 4, 9, ( ), 25, ( ), …
(d) 2, 6, 12, ( ), ( ), …
(e) 11, 88, 16, 80, 21, 72, ( ), ( ), …
Answer entry: enter all nine blanks in order: (a) two, (b) one, (c) two, (d) two, (e) two, separated by semicolons.
**Editorial input note:** Use no spaces before or after semicolons.