Essential skills for interpreting data and reports in UPSC papers include analytical thinking, critical reasoning, and numeracy. Candidates must effectively read charts, graphs, and statistical data to extract relevant information and insights. Mastery in these areas enables aspirants to draw appropriate conclusions, align with questions, and support their arguments with evidence. Additionally, the skill of contextualizing data within broader societal or economic issues enhances responses and demonstrates the candidate's understanding of the subject matter, making it pivotal for success in the exam.