Here's the general rule:
* Indent the first line of each paragraph: This is standard APA formatting.
* Do not indent numbered lists: Numbered lists are formatted differently to clearly distinguish them from regular paragraphs.
Example:
1. What is the main purpose of this study?
2. How were the participants recruited?
3. What were the key findings of the research?
Note: If your numbered question is very long, you can break it into multiple lines. In this case, indent the second and subsequent lines of the question.