Introduction
Analyzing previous years' papers can be an effective strategy to make informed guesses on history questions in UPSC exams. By studying the patterns, trends, and types of questions asked in the past, candidates can develop a better understanding of the exam pattern and focus their preparation accordingly. This approach can help them improve their chances of scoring well in the history section of the UPSC exams.

1. Identify recurring themes and topics
Analyzing previous years' papers allows candidates to identify recurring themes and topics in the history section. By understanding these patterns, candidates can focus their preparation on these areas, ensuring they have a strong foundation in the most frequently asked topics. This helps in making informed guesses, as questions related to these recurring themes are more likely to be asked again.

2. Familiarize yourself with question types
By analyzing previous years' papers, candidates can get an idea of the different types of questions asked in the history section. This includes multiple-choice questions, matching questions, true/false, and descriptive questions. Understanding the question types and their formats can help candidates develop a strategy to answer them effectively and make informed guesses when necessary.

3. Identify important subtopics
Analyzing previous years' papers can help candidates identify important subtopics within the broader history syllabus. By looking at the distribution of questions across different subtopics, candidates can prioritize their preparation and allocate more time to studying the areas that are frequently asked. This helps in making informed guesses as candidates are more likely to have knowledge about these important subtopics.

4. Identify question patterns
Examining previous years' papers can reveal question patterns that the UPSC tends to follow. This includes the emphasis on certain time periods, regions, or historical events. By understanding these patterns, candidates can develop a strategy to tackle such questions and make informed guesses based on their knowledge of the recurring patterns.

Conclusion
Analyzing previous years' papers is an effective strategy to make informed guesses on history questions in UPSC exams. It helps candidates identify recurring themes, question types, important subtopics, and question patterns. By leveraging this information, candidates can prioritize their preparation, focus on the areas that are frequently asked, and improve their chances of scoring well in the history section of the UPSC exams.