Choose the letter of the correct answer. Write your answer on a separate sheet of paper. 1. Which sequence illustrates an arithmetic sequence? A. 1, 1, 2, 3, 5, … C. 1, 4, 7, 10, 13, … B. 1, 2, 4, 7, 11, D. 1, 2, 4, 8, 16, … 2. Which sequence is NOT an arithmetic sequence? A. 2, 5, 8, 11, … C. 16, 12, 8, 4, … B. 3, 7, 11, 15, … D. 16, 13, 11, 10,… 3. What is the common difference of the sequence 4, 9, 14, 19, …? A. 5 B. --5 C. 10 D. -10 4. The common difference of the following sequences is 3 EXCEPT ___________. A. 3, 6, 9, 12, … C. 20, 17, 14, 11, … B. 7, 10, 13, 16, … D. -22, -19, -16, -13, … 5. Which of the sequence has a common difference of 4? A. 1, 4, 16, 64. .. C. 4, 8, 12, 16, … B. 2, 4, 8, 16, … D. 4, 12, 36, 108, …