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UPSC Prelims Previous Year Question Papers PDF (2026–2015) with Answer Key

UPSC Prelims Previous Year Question Papers PDF
with Answer Key

Download year-wise UPSC Prelims GS Paper 1 & CSAT Paper 2 question papers PDF (2026–2015).

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The table below provides year-wise links to UPSC Prelims question papers.

UPSC Prelims year-wise solution PDFs for GS Paper 1 and CSAT Paper 2
YearGS Paper 1CSAT Paper 2
2026Download PDFDownload PDF
2025Download PDFDownload PDF
2024Download PDFDownload PDF
2023Download PDFDownload PDF
2022Download PDFDownload PDF
2021Download PDFDownload PDF
2020Download PDFDownload PDF
2019Download PDFDownload PDF
2018Download PDFDownload PDF
2017Download PDFDownload PDF
2016Download PDFDownload PDF
2015Download PDFDownload PDF

Don’t just download PYQs. Practise them topic-wise before Prelims.

Practise UPSC PYQs topic-wise, subject-wise, and in full-length tests on MARKS UPSC App, 100% FREE.

Start Topic-wise PYQ Practice

UPSC Prelims Subject-Wise Weightage & PYQ Trend Analysis : 3, 5, 7 & 10 Years

Analyse UPSC Prelims subject-wise weightage and previous year question trends across the last 3, 5, 7 and 10 years. Compare the percentage share of Polity, History, Geography, Economy, Environment, Science & Technology and other subjects to identify high-weightage areas and plan your UPSC Prelims preparation strategically.

Subject
%
PYQs
Indian Polity

Indian Polity

-17% since last 5 years

16.7%
Economy

Economy

+16% since last 5 years

16.3%
Environment & Ecology

Environment & Ecology

-12% since last 5 years

11.9%
Technology

Technology

+13% since last 5 years

10.1%
International Relations

International Relations

+344% since last 5 years

9.2%
Ancient History

Ancient History

+29% since last 5 years

6.2%
Modern History

Modern History

-47% since last 5 years

4.8%
Geomorphology

Geomorphology

+150% since last 5 years

3.4%
Indian Physical Geography

Indian Physical Geography

-17% since last 5 years

3.4%
Climatology

Climatology

+550% since last 5 years

3%
Art & Culture

Art & Culture

-20% since last 5 years

2.8%
Economic Geography

Economic Geography

+175% since last 5 years

2.5%
Medieval History

Medieval History

+10% since last 5 years

2.5%
Biology

Biology

+83% since last 5 years

2.5%
Physics

Physics

+133% since last 5 years

1.6%
Chemistry

Chemistry

+20% since last 5 years

1.4%
Oceanography

Oceanography

-25% since last 5 years

0.7%
Biogeography

Biogeography

-33% since last 5 years

0.5%
Social Geography

Social Geography

+100% since last 5 years

0.5%

Benefits of Solving UPSC Prelims Previous Year Question Papers

Solving UPSC Prelims previous year question papers (PYQs) is one of the most effective ways to understand what UPSC actually asks. Regular PYQ practice helps you analyse the Prelims exam pattern, subject-wise trends, question difficulty, recurring themes, and your preparation level before the actual exam.

Understand the UPSC Prelims Exam Pattern

UPSC Prelims PYQs show how the Commission frames questions, mixes static concepts with current affairs, and tests elimination and conceptual clarity. Solving past papers regularly helps you become familiar with the actual UPSC Prelims question pattern.

Improve Speed and Time Management

A full UPSC Prelims paper requires you to attempt 100 GS questions or 80 CSAT questions within 2 hours. Practising previous year papers under timed conditions helps improve speed, question selection, accuracy, and exam-day time management.

Evaluate Your UPSC Prelims Preparation

Previous year question papers give you a realistic way to test your preparation. Analyse your answers after every attempt to identify strong subjects, weak topics, accuracy gaps, and areas that need more revision.

Identify Repeated Topics and PYQ Trends

UPSC may not repeat the same questions, but important topics, concepts, and themes frequently reappear in different forms. Analysing several years of UPSC Prelims PYQs helps you spot recurring areas and prioritise high-value topics during revision.

UPSC Prelims PYQs: Practice Strategy & FAQs

Find answers to common questions on UPSC Prelims previous year questions (PYQs), including how to practise PYQs topic-wise, when to attempt full-length papers, how to analyse mistakes, and where to practise subject-wise PYQs, NCERT MCQs, standard book question banks, and more on the MARKS UPSC App.

What is the best way to practise UPSC Prelims PYQs?↓
The best way is to start with topic-wise PYQs at the micro level, while you are studying each topic. After completing most of the syllabus, move to full-length PYQ tests, analyse your mistakes, and return to weak topics for revision and re-practice.
Should I practise UPSC PYQs topic-wise or year-wise first?↓
Start with topic-wise PYQs first. This helps you understand how UPSC tests a specific concept across different years; full-length year-wise papers are more useful later for exam simulation.
Where can I practise UPSC Prelims PYQs topic-wise?↓
You can practise topic-wise UPSC Prelims PYQs on the MARKS UPSC App. PYQs are organised at the micro-topic level so you can practise questions immediately after studying a topic.
Where can I practise UPSC PYQs subject-wise?↓
The MARKS UPSC App provides subject-wise UPSC PYQ practice across Polity, History, Geography, Economy, Environment, Science & Technology and other Prelims subjects. Subject-wise practice is useful after completing multiple topics within a subject.
When should I start solving full-length UPSC previous year papers?↓
Start full-length PYQ tests after you have covered most of the Prelims syllabus and practised topics individually. At this stage, full papers help test accuracy, elimination, time management and overall exam readiness.
How many years of UPSC Prelims PYQs should I practise?↓
Ideally, analyse and practise at least the last 10 years of UPSC Prelims PYQs. This helps you identify recurring concepts, question patterns and long-term subject trends.
Where can I download UPSC Prelims previous year question papers?↓
You can download UPSC Prelims GS Paper 1 and CSAT Paper 2 previous year papers from 2015 to 2026 from the year-wise table on this page.
Are UPSC previous year paper PDFs enough for PYQ preparation?↓
PDFs are useful for full-paper practice, but they are less convenient for focused revision. The MARKS UPSC App organises PYQs topic-wise, subject-wise and as full-length tests, making targeted practice much easier.
Where can I practise NCERT MCQs for UPSC Prelims?↓
The MARKS UPSC App includes NCERT Question Banks for UPSC, allowing you to practise MCQs after reading individual NCERT chapters and test how well you have understood the concepts.
Where can I practise MCQs from standard UPSC books?↓
You can practise Standard Book Question Banks on the MARKS UPSC App, covering key sources such as M. Laxmikanth for Indian Polity, Spectrum for Modern Indian History, G.C. Leong for Geography, and other important books from the UPSC Prelims booklist.
Where can I practise MCQs for the complete UPSC booklist?↓
The MARKS UPSC App brings together UPSC PYQs, NCERT Question Banks, Standard Book Question Banks and MCQs covering the UPSC booklist in one place.
When should I start practising UPSC PYQs?↓
Start PYQ practice alongside the syllabus, not after finishing everything. Study a topic, practise its PYQs, identify gaps, revise, and then move to the next topic.

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9,500+ UPSC PYQs across 245+ topics, with year-wise trends and progress tracking — free on Marks UPSC.

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