ACT Math · Functions
Sequences and series practice questions
Each free question on this page comes with its answer and a full explanation.
- Question 59A sequence is defined by a_n = 3n - 2. What is a_10?
- Question 100A geometric sequence has first term 3 and common ratio 2. What is the 6th term?
- Question 145An arithmetic sequence has first term 5 and common difference 3. What is the sum of the first 10 terms?
- Question 189A sequence is defined recursively by a_1 = 4 and a_n = 2a_n-1 + 3. What is a_4?
- Question 237A theater has 20 seats in the first row. Each subsequent row has 4 more seats than the row before it. How many seats are in the…
- Question 245A sequence is defined by a_1 = 100 and a_n = a_n-1 - 7. What is a_5?