SASMO 2027 · Grades 2-3 · SET 004 · Self-study Question 11

The sequence is 2, 2, 1, 3, 11, 2, 2, 1, 3, 11, 2, 2, 1, 3, 11, … .

(a) What is the 21st number?

(b) What is the sum of the first 21 numbers?

Continue the repeating block shown. Enter (a); (b), separated by a semicolon.