Video lectures
Maths and reasoning, year by year.
Each series works through the maths and reasoning questions of one paper. Pick any year, or start at 2020 and work forward in order.
Five years of papers, 2020 to 2024
The longest series on the channel. Maths and reasoning questions from five Prelims papers, worked out.
Open on YouTube → 17 videosCSAT 2024
The 2024 maths and reasoning questions.
Open on YouTube → 21 videosCSAT 2023, question by question
The 2023 maths and reasoning questions, in order.
Open on YouTube → 9 videosCSAT 2023, maths and reasoning
The same paper again, this time grouped by the kind of question.
Open on YouTube → 19 videosCSAT 2022, question by question
The 2022 maths and reasoning questions, one at a time.
Open on YouTube → 8 videosCSAT 2022, solved in sets
The 2022 paper again, taken in sets rather than one at a time.
Open on YouTube → 8 videosCSAT 2021
The 2021 maths and reasoning questions.
Open on YouTube → 20 videosCSAT 2020
The 2020 maths and reasoning questions.
Open on YouTube → 2 videosCSAT 2016
Two questions from 2016. A short series.
Open on YouTube →By topic
If the problem is a topic, not a year.
Get one method clear and it works in every year’s paper. These series teach the method itself.
Quantitative aptitude
The maths itself, taught topic by topic rather than through a paper. Start here if numbers are the problem.
Open on YouTube → 4 videosTopic-wise preparation for 2026
Built around the topics that keep coming back, rather than around one year.
Open on YouTube → 4 videosQuant shorts
Single tricks, under a minute each. Useful on a phone in a queue.
Open on YouTube → 3 videosPast question shorts
One past question, solved fast.
Open on YouTube → 7 videosCSAT 2025 shorts
Short pieces from the 2025 cycle.
Open on YouTube →Papers and answer keys
Every CSAT paper from 2011 to 2026.
Download them, print them, pass them on. No email is asked for and no count is kept. Each file size is written beside it, so you know before you tap.
| Year | Question paper (PDF) | Answer key (PDF) |
|---|---|---|
| 2026 | Question paper 5.5 MB | Not released by UPSC yet |
| 2025 | Question paper 6.0 MB | Answer key 0.3 MB |
| 2024 | Question paper 6.0 MB | Answer key 0.4 MB |
| 2023 | Question paper 6.2 MB | Answer key 0.1 MB |
| 2022 | Question paper 6.1 MB | Answer key 0.3 MB |
| 2021 | Question paper 6.6 MB | Answer key 0.3 MB |
| 2020 | Question paper 5.0 MB | Answer key 0.4 MB |
| 2019 | Question paper 0.8 MB | Answer key 0.4 MB |
| 2018 | Question paper 4.7 MB | Answer key 1.5 MB |
| 2017 | Question paper 3.4 MB | Answer key 0.3 MB |
| 2016 | Question paper 3.8 MB | Answer key 0.9 MB |
| 2015 | Question paper 1.5 MB | Answer key 1.2 MB |
| 2014 | Question paper 1.1 MB | Answer key 0.5 MB |
| 2013 | Question paper 3.3 MB | Answer key 0.2 MB |
| 2012 | Question paper 1.3 MB | Answer key 0.6 MB |
| 2011 | Question paper 1.4 MB | Answer key 0.1 MB |
How to use these
Begin with no clock. Work through one whole paper and write the working for every question on paper. Then open the answer key. Wherever your method and the key take different routes is where the learning comes fastest.
Once three or four papers have been done that way, put the clock on. By then the method is yours, and the clock only makes it quicker.
We have read these and counted them
The 2024 paper is placed question by question, and the comprehension questions are counted for every year. With them, how the penalty rule changed in 2014, and which block came back in 2026.
General Studies Paper I
The other Prelims paper, 2011 to 2026.
Every year’s question paper and answer key, exactly as for CSAT.
| Year | Question paper (PDF) | Answer key (PDF) |
|---|---|---|
| 2026 | Question paper 7.0 MB | Not released by UPSC yet |
| 2025 | Question paper 5.5 MB | Answer key 0.3 MB |
| 2024 | Question paper 5.5 MB | Answer key 0.5 MB |
| 2023 | Question paper 5.1 MB | Answer key 0.5 MB |
| 2022 | Question paper 6.5 MB | Answer key 0.1 MB |
| 2021 | Question paper 5.7 MB | Answer key 2.5 MB |
| 2020 | Question paper 5.0 MB | Answer key 2.9 MB |
| 2019 | Question paper 1.3 MB | Answer key 0.5 MB |
| 2018 | Question paper 4.9 MB | Answer key 1.5 MB |
| 2017 | Question paper 5.3 MB | Answer key 0.4 MB |
| 2016 | Question paper 3.8 MB | Answer key 0.8 MB |
| 2015 | Question paper 1.1 MB | Answer key 1.5 MB |
| 2014 | Question paper 1.0 MB | Answer key 1.5 MB |
| 2013 | Question paper 4.6 MB | Answer key 0.2 MB |
| 2012 | Question paper 1.1 MB | Answer key 0.4 MB |
| 2011 | Question paper 1.3 MB | Answer key 0.1 MB |
About these papers
Sixteen years of question papers and fifteen answer keys. There are no GS Paper I video lectures yet. The current affairs videos are below.
These are the Set A papers. UPSC issues four sets each year with the same questions in a different order, so one set is enough to practise from. UPSC has not released the 2026 key yet, so that cell says so rather than holding a dead link.
Worked solutions
Twelve questions, opened all the way up.
Every question in the CSAT Check is explained three ways: the full method, the exam-hall shortcut, and the trap most people fall into. This part is free whether you buy anything or not.
You do not have to take the test to read them. Scroll to the end and read the solutions directly. Plenty of people do that, and it works.
The rest of the exam
Current affairs, and the exam itself.
These two series sit outside CSAT. The first keeps the part of the newspaper the exam actually uses. The second is about the exam itself, and it includes the video on the Mains QCA booklet.
Current affairs
Short pieces on what is in the news, for the reading part of the paper and for Paper I.
Open on YouTube → 9 videosGeneral information
About the exam itself: the pattern, the marking, and what changes year to year.
Open on YouTube →Mains
One video on Mains, on how the Question cum Answer booklet works. It sits in the General information series above.
New material is announced on the Telegram channel. Community →
Not sure where to start?
Take the free fifteen-minute check first. It will tell you which of the things above you need first.