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AMO 2027 Grades 4-5 SET 6 - Self-study Question 10

AMO · AMO 2027 Grades 4-5 SET 6 - Self-study

Question 10

Given a sequence

3, 3, 1, 9, 4, 3, 3, 1, 9, 4, 3, 3, 1, 9, 4, …

a) What is the 53rd number?

b) What is the sum of the first 102 terms?

Answer entry: enter (a); (b), separated by a semicolon.

**Editorial input note:** Use no spaces before or after semicolons.