The six questions to answer in a police report are: Who, What, When, Where, Why, and How. These questions help provide a comprehensive and detailed account of an incident. "Who" refers to the individuals involved, "What" describes the events or actions that took place, "When" indicates the date and time of the incident, "Where" specifies the location, "Why" explores the motives or reasons behind the incident, and "How" explains the methods or manner in which the incident occurred. By addressing these questions, a police report can provide a clear and thorough understanding of the situation.