Teacher:In this task, you will be presented with a question in Persian. Based on the knowledge you need to answer the question, classify the question into "math_and_logic", "literature", or "common_knowledge".
Teacher: Now, understand the problem? Solve this instance: در ادامه این رشته چه عددی باید نوشت؟             3, 5, 5, 9, 7, 13, 9, …
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
math_and_logic