CDS in 30 Days: A Chapter Priority Plan for Maths, GK and English

With CDS II 2026 set for 13 September, most candidates reading this have about a month left. A month is enough, but only if you stop trying to cover everything and start covering the right things first. The syllabus does not reward equal effort. A handful of chapters in each paper produce most of the marks, and the last thirty days are won by the candidate who pours time into those chapters and refuses to be dragged into the rest.

This is a chapter priority plan for all three papers, Elementary Mathematics, General Knowledge and English. It tells you what to revise first, what to revise if there is time, and what to leave alone. Follow the order, not your comfort zone.

A note on the weightage below. These shares are based on the pattern of recent CDS papers, not official figures, since UPSC never publishes a chapter wise breakdown. They are stable enough to plan a month around, but treat them as priorities, not promises.

The Principle for the Final Month

Three rules shape everything that follows.

First, revise by marks, not by syllabus order. The chapters that appear most often are where your hours belong, no matter where they sit in the textbook.

Second, in thirty days you consolidate, you do not discover. This is not the time to open a brand new topic you have never studied. It is the time to make the topics you half know fully reliable.

Third, past papers are the plan, not a supplement to it. Every hour in this month should end with questions solved, because CDS repeats its question types relentlessly and solving is what fixes them. You can practice every CDS paper chapter by chapter on Padhify while you work through this plan.

The 30 Days at a Glance

Now the chapter priority inside each paper.

Elementary Mathematics: Priority Order

Maths is the paper where a plan pays off most, because the weightage is the most predictable of the three and the marks concentrate heavily.

Revise first (the spine, roughly half the paper)

Arithmetic alone is a third of the paper, and it is the most repetitive block in the syllabus. If you fix nothing else in Maths, fix percentages, profit and loss, time and work, and time speed distance. Geometry is the second pillar and rewards knowing a fixed set of theorems cold.

Revise second (high return, formula driven)

These two are pure formula and practice. There is nothing to understand deeply, only formulas to memorize and apply, which makes them the fastest chapters to turn into guaranteed marks in a single month.

Revise if time allows

Statistics is small but easy, so do not skip it entirely. Read it in the last week for cheap marks.

Solve CDS Elementary Mathematics past papers chapter by chapter here, starting with arithmetic and geometry.

General Knowledge: Priority Order

GK is the widest paper, so the plan matters most here to stop you drowning in it. The trick is to build the static portions first, because those repeat almost verbatim across years, and to treat current affairs as a light daily habit rather than a chapter to cram.

Revise first (the static core)

General Science is the single largest block in the paper and the one where past questions repeat most openly. History is heavily repeated and almost entirely static, which makes it ideal for a month long revision.

Revise second (static and high yield)

Geography rewards map work and a fixed set of concepts. Polity is compact, high yield and rarely changes, so a few focused sessions cover it well.

Revise alongside, daily and light

Give current affairs fifteen minutes a day of the last few months' events, no more. It is worth real marks but it does not reward cramming, and the static subjects above will always give you a better return on the same hour.

Practice CDS General Knowledge past papers chapter by chapter here and lock down science and history before you touch anything else.

English: Priority Order

English is the most learnable of the three papers, because it tests a closed set of question types. In a month you can move it from a weak paper to a strong one, and a strong English score is the cushion that protects you on a hard Maths or GK day.

Revise first (more than half the paper)

Sentence arrangement and error spotting reward pattern recognition, which is built only by doing them in bulk. Reading Comprehension needs no study at all, only timed practice so you learn to read fast and answer from the passage rather than from memory.

Revise second

Synonyms, antonyms and idioms are vocabulary, which means a list to build rather than a concept to learn. Twenty words and a few idioms a day across the month covers most of this block.

Work through CDS English past papers chapter by chapter here. This is the paper where a month of steady practice moves your score the most.

The Week by Week Schedule

Week 1: the heavy chapters. Maths arithmetic and geometry. GK general science and history. English ordering, error spotting and comprehension. End every session with past questions on that day's topic. Do not move on from a chapter until you can solve its questions without hesitating.

Week 2: the second tier. Maths trigonometry and mensuration. GK geography and polity. English vocabulary types and sentence improvement. Keep a daily fifteen minute current affairs habit running in the background from now to the exam.

Week 3: finish and test. Cover the remaining chapters, algebra and statistics in Maths, economics and the miscellaneous portions in GK. Then take your first full, timed paper for each subject. The point is not the score. The point is to find where you lose time and where you lose marks.

Week 4: mocks and review only. No new material. Take full CDS mock tests under real conditions, then spend as long reviewing each mock as you spent taking it. Revisit only the highest yield chapters: arithmetic and geometry, science and history, ordering and errors. Trust that the groundwork of the first three weeks is done.

The Attempt Strategy That Protects Your Score

All the revision in the world can be undone in the hall by careless attempts. CDS carries one third negative marking on every paper, so the candidates who clear it are disciplined, not reckless.

• Attempt a question only when you can eliminate at least two of the four options. A pure guess loses you more over a full paper than it gains.
• Do the paper in two passes. First pass, answer everything you know cold. Second pass, return to the ones worth a considered attempt.
• Bank your strong paper. If English is your strength, secure every easy mark there first, because those are the marks that carry you when Maths runs hard.

A Realistic Word Before You Start

One month is enough to clear CDS if you spend it on the right chapters, and not enough if you spread it thin across everything. The plan above is deliberately unequal because the paper is unequal. Give the spine chapters the bulk of your hours, keep current affairs to a light daily habit, and let past papers, not fresh theory, carry the month.

You can practice every CDS past paper, chapter by chapter, on Padhify, across Elementary Mathematics, General Knowledge and English, with a clear explanation for every answer. If you want the full weightage picture behind this plan, read our five year CDS papers analysis, and for dates and eligibility see the CDS 2026 exam guide.

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