The PYQ Vault · Our method
How we verify every question
Three rules: UPSC's words, UPSC's answer, and no fact without a source you can open.
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1. The question: UPSC's own paper
Text comes from UPSC's question papers on upsc.gov.in (2016–2026; Series A for Prelims), proofread word for word against the scan. We fix reading errors only — never UPSC's wording, even where it has a misprint. Maps and figures are shown as a crop of UPSC's own page.
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2. The answer: UPSC's official key
Final keys for 2016–2025. For 2026, UPSC's provisional key, labelled on every question until the final key appears. Questions UPSC dropped say so; where UPSC accepted two answers, both are shown. If a key is debated, the page still shows UPSC's answer, with a short note, clearly labelled as ours, on how a stricter reading differs and what to do in the exam.
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3. The explanation: every fact at source
Written fresh by Minimalist IAS, statement by statement. Each fact is checked in, in this order: NCERT textbooks; Government of India pages, the Constitution and laws; UN and other intergovernmental bodies. The line that proves it is quoted word for word, with a link you can open. Only where no official page states a fact do we use a standard reference work — and label it "reference work".
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4. Mains: the syllabus line, the demand and a model answer
Each Mains question is mapped to the exact line of UPSC's official syllabus (Exam Notice 05/2026-CSP), and broken into the parts the examiner asks for. We then give an approach (how to open, the points to cover, how to close) and a model answer written by Minimalist IAS. UPSC publishes no model answers, so ours is labelled as ours. Figures, dates and scheme details are checked against official sources, and any we add are quoted with a link. Essay topics get the demand and an outline.
Every model answer follows the same discipline:
- Headings that mirror the question, so each part of the demand is visibly answered.
- An introduction chosen for that question (a definition, data, a recent event, the historical or constitutional background, or a quotation), with a line that leads into the demand.
- Points that open with a bold keyword, explain in a few plain words, and carry a verified specific: data, a scheme, a judgment, a committee or a real example.
- A way forward whenever the analysis ends on problems, even if the question does not ask for one, built on committee and commission recommendations, steps already under way and proven best practices.
- A conclusion that adds value instead of repeating the body. It links the answer to national goals, global commitments such as the SDGs, or a thinker's insight.
- A table, flowchart, diagram or timeline where it makes the answer clearer, and a note on what to sketch where a map helps.
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5. Automatic checks before anything is published
A checker confirms that the answer matches UPSC's key, that every quote really appears on the page it cites, that the text matches UPSC's paper for that question, and that no sentence is copied from coaching material. Each explanation shows the date it was last checked.
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6. Corrections
Found something wrong? Tap "Report an error" on the question. We re-check it at source and fix the page.
In the Vault today: 1,100 Prelims GS questions (1,100 with full explanations), 880 CSAT questions with step-by-step solutions, and 884 Mains questions with approaches and model answers (essays: outlines) — every one from UPSC's papers, 2016–2026.
Questions students ask
Are the answers in the Minimalist IAS PYQ Vault official?
Yes. Every answer is UPSC's own answer key — final keys for 2016–2025, and UPSC's provisional key for 2026 (marked "Provisional key" on each question until UPSC publishes the final one). We never change UPSC's answer.
Where does the question text come from?
From UPSC's own question papers published on upsc.gov.in (Series A for Prelims). Each question is proofread against the scan of UPSC's paper, and every question page links to that paper and to UPSC's answer key.
Who writes the explanations, and how are they checked?
Minimalist IAS writes every explanation in its own words. Each fact is checked in an official source — NCERT textbooks, Government of India pages, the Constitution and laws, or UN and other intergovernmental bodies — and the supporting line is quoted word for word, with a link. Where no official page states a fact, a standard reference work is used and marked as such.
Do the Mains pages give model answers?
Yes. They are written by Minimalist IAS, not by UPSC (UPSC publishes none). Each answer starts from the question's demand, meaning every part the examiner asks for, and gives headings, specific facts and a balanced conclusion. Some answers run a little over UPSC's word limit so that every part is covered; trim to the limit in the exam. Essay topics get the demand and an outline, not a full essay.
What if I find a mistake?
Use "Report an error" on the question. We re-check it against the sources and correct the page; each explanation shows the date it was last checked.