Maths Chapter Weightage for SSC and RRB: Where to Spend Your Study Hours

Every maths syllabus looks endless when you first open the book. Percentages, ratio, mixtures, boats and streams, trigonometry, mensuration, and then a heap of geometry theorems. The natural question is which chapters to do first, and which ones you can leave half done.

That is what chapter weightage is meant to answer. It is also where most of the confusion starts, because the numbers you find online do not agree, they are rarely sourced, and almost none of them say how they were counted. So this post does two things. It gives you a working picture of how maths questions are usually distributed in SSC and RRB papers, clearly marked as approximate. And it shows you how to turn that picture into a study plan without treating any single number as gospel.

A note on how reliable weightage tables are

Neither SSC nor the railway boards publish a chapter-wise breakdown. What you see online is a count done by coaching platforms and YouTube educators who go through the question papers of each shift and tag questions to chapters. The tagging is subjective. A question about a right-angled triangle inscribed in a circle might be counted as geometry by one person and mensuration by another. A "percentage-based profit question" may be counted under percentage or profit and loss.

So take these things as given:

• Treat every figure as approximate, and treat ranges as more honest than single numbers.
• The total number of maths questions per paper is what the official notification fixes; how they split between chapters is not.
• Distributions shift between years and between shifts. A chapter that gave five questions in one shift may give one in another.
• For SSC CGL Tier 1, analyses circulated for the 2024 exam were built from data across dozens of shifts, and the broad picture is stable: arithmetic dominates, and the four "big" topics (algebra, geometry, mensuration, trigonometry) each add a few questions.

I have not been able to verify chapter counts against any official source, because none exists. What I have done is use commonly cited ranges and sanity-check that they add up to the paper size. Where I say "approximately", believe me.

The paper sizes first (this part is official, but check the notification)

The number of maths questions per paper is what you can pin down:

Exam	Maths section	Marks	Negative marking
SSC CGL Tier 1	25 questions	50	0.5 per wrong answer
SSC CHSL Tier 1	25 questions	50	0.5 per wrong answer
RRB NTPC CBT 1	30 questions	30	one-third per wrong answer
RRB Group D CBT	25 questions	25	one-third per wrong answer
IBPS PO and Clerk prelims	roughly 35 questions	see notification	0.25 per wrong answer

The bank numbers have been revised in recent cycles, so check ibps.in for the latest. For SSC and RRB, check ssc.gov.in and the RRB notifications. The rest of this post is mostly about SSC CGL and RRB NTPC/Group D, since that is the SSC/RRB half of the series. Bank quant has a different shape and gets more emphasis on data interpretation and simplification, which is covered in data interpretation tricks and simplification and approximation tricks.

SSC CGL Tier 2 has its own maths paper with a much heavier load and harder difficulty. Look up the current pattern in the notification. Everything here about Tier 1 weightage applies as a foundation, but Tier 2 goes deeper into geometry, trigonometry and algebra, so you will need more time on those.

SSC CGL Tier 1: the approximate picture

Here is the commonly cited spread over 25 questions, in ranges, with my own planning number in the last column. The planning number is one way to make a range add to 25. It is not a prediction.

Chapter group	Typical questions per paper (approx.)	Planning number
Arithmetic (percentage, ratio, profit-loss-discount, SI/CI, average, mixture, time-work, time-speed-distance, partnership)	8 to 11	9
Algebra	2 to 4	3
Geometry (lines, triangles, circles, quadrilaterals)	2 to 4	3
Mensuration	2 to 4	3
Trigonometry (ratios, identities, heights and distances)	2 to 4	3
Number system and simplification	1 to 3	2
Data interpretation and statistics	2 to 4	2
Total		25

Two things to notice. First, arithmetic alone is over a third of the paper, and it is the least conceptual part. Second, geometry, mensuration, trigonometry and algebra individually give few questions, but taken together they give around 12, which is nearly half the paper. That is why skipping "hard" chapters is costly.

Marks-wise, a planning number of 9 arithmetic questions is 18 marks out of 50, which is 36% of the section. Three questions of geometry are 6 marks, or 12%. Data interpretation and number system with 2 questions each are 4 marks, or 8% each.

RRB NTPC CBT 1: 30 questions

The NTPC maths section has 30 questions. It is basically the same syllabus at a slightly lower average difficulty, and the questions are worth one mark each with one-third negative. Analyses from coaching sites suggest arithmetic accounts for a bit under half the section, which matches the SSC picture, plus a few questions each from geometry and mensuration, some trigonometry, DI and number system/simplification. Again, approximate:

Chapter group	Typical questions (approx.)	Planning number
Arithmetic core	12 to 15	14
Algebra	2 to 3	3
Geometry and mensuration	4 to 5	4
Trigonometry	2 to 3	2
Data interpretation	2 to 3	3
Number system, simplification, others	3 to 4	4
Total		30

RRB Group D: 25 questions, Class 10 level

Group D maths is set at about Class 10 standard, and questions tend to be direct. Coaching analyses suggest 15 to 18 of the 25 questions come from high-frequency arithmetic and number topics: percentage, ratio and proportion, profit and loss, time and work, time-speed-distance, number system, simplification and mensuration. The rest are simple algebra and geometry.

A Group D planning split, again approximate:

Chapter group	Planning number
Arithmetic	16
Number system and simplification	3
Algebra	2
Geometry and mensuration	3
Basic trigonometry or DI	1
Total	25

If you are preparing for Group D, you can, frankly, ignore most high-level geometry theorems and advanced trigonometry. If you are preparing for CGL or NTPC, you cannot.

Turning weightage into study hours

Weightage tells you where the marks are. It does not tell you where the hours should go, because a chapter has to be learnable as well. A simple way to combine them is to ask two questions for each chapter: how many marks does it carry, and how many hours will it take me to get to a reliable 70% accuracy?

Example split for a first pass through SSC CGL quant, assuming 100 hours are available for the first round. Distribution by planning number:

• Arithmetic (9 questions of 25) is 36% of the questions, so about 36 hours.
• Algebra, geometry, mensuration and trigonometry (3 each, so 12 questions) is 48% of the questions, so about 48 hours. But because these chapters are heavier on concepts, I would push this a bit higher, and pull time from DI and number system.
• Number system and simplification (2 questions) is 8%, about 8 hours.
• DI (2 questions) is 8%, about 8 hours. I would keep this tight because DI mostly rides on the speed you build in arithmetic.

That adds up: 36 + 48 + 8 + 8 = 100. In practice you would shade it. Someone who is already fine at algebra can move 5 hours to geometry. Someone who finds trigonometry frightening might give it 15 hours instead of 12, because the identities are finite and once learned they pay off.

The point of this exercise is not the exact number. It is to see that "I will finish arithmetic first and geometry later" is a fair plan only if you actually reach geometry with enough time. A lot of people spend 70% of their maths time on arithmetic in the first two months and then reach the second half with three weeks to go.

Expected marks per chapter (why accuracy matters more than the count)

Weightage counts questions. What matters is the marks you actually gain, and that depends on accuracy.

Take geometry with 3 questions in SSC CGL Tier 1, 2 marks each, 0.5 negative. The expected marks from a question you attempt with probability p of being correct are 2p − 0.5(1 − p), which simplifies to 2.5p − 0.5.

Your accuracy in the chapter (p)	Expected marks per attempted question	For 3 questions
20%	0.0	0.0
40%	0.5	1.5
70%	1.25	3.75
90%	1.75	5.25

Two takeaways. At 20% accuracy the expected value is zero, so guessing gains nothing on average. And moving from 40% to 70% accuracy on just those three questions is worth about 2.25 marks. Multiply that across four "hard" chapters and you see how a candidate with the same speed but better accuracy in conceptual chapters gains nearly 8 to 9 marks, which matters a lot in Tier 1.

For RRB the penalty is one-third of a mark per wrong answer on a one-mark question. Expected value is p − (1 − p)/3, which is zero at p = 25%. For a bank paper with 0.25 penalty, the break-even is 20%. These are the thresholds below which attempting a question loses marks on average. Above them, attempting pays. It is worth knowing which side of the line you sit on for each chapter.

Chapter by chapter: what tends to be asked, and one example each

Below is a sense of what the typical question in each chapter looks like. The examples are simple and calculated, so you can check your understanding. They are not from any real paper.

Percentage and profit-loss-discount

Nearly every arithmetic question is a percentage question in disguise. A typical one: a price is raised by 20% and then reduced by 20%. What is the net change? Multiply 1.2 by 0.8 to get 0.96. So it is a 4% decrease. The classic mistake is to say no change.

Marks are dependable here, and a solid grip on the fraction-percent table (see the simplification post) pays for hours. The companion posts are percentage tricks and profit and loss tricks.

Time and work, pipes, time-speed-distance

If A can finish a job in 12 days and B in 18 days, together they take 12 × 18 / (12 + 18) = 216/30 = 7.2 days. LCM method: assume 36 units of work, A does 3 a day, B does 2 a day, together 5 a day, and 36/5 = 7.2 days. Both are correct, and the LCM method scales to three workers and to pipes. See time and work tricks.

Algebra

Expect identities and value-of-expression problems more than long equation solving. If x + 1/x = 5, then x² + 1/x² = 5² − 2 = 23. It takes ten seconds if you know the identity and two minutes if you do not.

Geometry

Triangles, circles and quadrilaterals, mostly theorem-application. In a triangle ABC with angle A = 50 degrees, if I is the incentre, angle BIC = 90 + A/2 = 90 + 25 = 115 degrees. Questions like this cannot be worked out from scratch under time pressure. You need the standard results in memory. That makes geometry a chapter where a fixed list of results plus practice gives a lot of return; see geometry shortcuts for SSC.

Mensuration

Formulas and unit handling. A cylinder with radius 7 cm and height 10 cm has curved surface area 2πrh = 2 × (22/7) × 7 × 10 = 440 square cm. Many of the marks lost here are avoidable: wrong unit, using total surface area instead of curved surface area, or mixing diameter and radius.

Trigonometry

Ratios, identities and heights-and-distances. If tan θ = 3/4 for an acute angle, then sin θ = 3/5 and cos θ = 4/5, so sin θ + cos θ = 7/5. The 3-4-5 triangle covers many such questions. See trigonometry formulas for SSC.

Number system

Remainders, divisibility, unit digits. What is the remainder when 2^10 is divided by 7? 2^10 = 1024, and 1024 = 7 × 146 + 2, so the remainder is 2. Or use 2³ = 8 ≡ 1 mod 7, so 2^10 = (2³)³ × 2 ≡ 2.

Simplification and DI

Covered in detail in their own posts. In Tier 1 they carry a few questions but they also decide how much time you have for everything else.

Which chapters give the best marks per hour?

There is no universal answer, but a rough ordering that many toppers describe is:

1. Percentage, ratio, average, profit and loss, simple and compound interest. Small formula set, high frequency, forgiving of small slips.
2. Time and work, TSD. More question types, but pattern-based, and the LCM approach makes them quick.
3. Mensuration. Formulas are finite. Once learned, questions are direct.
4. Trigonometry. A finite set of identities and standard angle values. Heights and distances is easier than it looks.
5. Algebra. Depends on your school background. Identities give quick marks.
6. Geometry. Highest effort per mark for most people, but three or so questions in Tier 1 make it worth doing in the last 30% of your prep time, not skipping.
7. Number system. Unpredictable but few questions. Learn remainders and unit digit basics and leave the rest.

I would not say "skip geometry". I would say "do it after the first five and give it steady time, but never let it eat arithmetic time".

A sample eight-week maths plan for SSC CGL Tier 1

This assumes about 90 minutes a day for maths, six days a week, starting with some school-level basics. If you have three or six months, stretch it, and see the SSC CGL 3, 6 and 12 month strategy.

• Weeks 1 to 2: Percentage, ratio, average, profit-loss-discount, SI and CI. Learn the fraction-percent table. Daily 20-question sets.
• Weeks 3 to 4: Time and work, pipes, TSD, boats and streams, mixture and alligation, partnership.
• Week 5: Number system, simplification, and approximation.
• Week 6: Algebra and mensuration.
• Week 7: Trigonometry and data interpretation.
• Week 8: Geometry. In practice, geometry needs more than one week, so begin it in week 6 with 20 minutes daily and continue.

After the first pass, spend the next weeks on mixed sets, timed. The goal of the first pass is to make every chapter work at least at 60% accuracy. The goal of the second pass is speed and accuracy on the same chapters, driven by your own errors from mocks.

How to use your mock results to adjust the weights

Published weightage is a starting point. Your own mock data is more useful. After each mock, tag every wrong or skipped maths question with its chapter. After four or five mocks you will have a table like this (fictional data):

Chapter	Questions seen	Correct	Skipped	Wrong
Arithmetic	45	34	3	8
Algebra	15	9	2	4
Geometry	15	5	6	4
Mensuration	15	10	2	3
Trigonometry	15	8	3	4

Arithmetic accuracy: 34/45 = 75.6%. Geometry: 5/15 = 33.3%. Geometry has both low accuracy and lots of skips, and with about three questions per real paper, moving it from 33% to 60% gains around 0.8 of a question per paper, or 1.6 marks. Arithmetic at 75.6%, if pushed to 85%, adds nearly 0.85 of a question on 9, which is 1.7 marks. So they are similar in marginal return, but arithmetic is cheaper to improve. Do the arithmetic errors first, then geometry.

The Pareeksha mock tests give you a section-wise breakdown and percentile after each attempt, and the practice section lets you drill single chapters. Use the mock to find the weak chapter and the sectional sets to fix it.

Common mistakes with weightage tables

• Treating the table as a prediction. It is a description of the past. A chapter with "low weightage" can still give four questions in your shift.
• Skipping a chapter entirely. With normalisation and a competitive cutoff, three missed questions can cost you the difference between a shortlist and a rejection. Study every chapter to at least a basic level.
• Ignoring the paper level. Tier 1 weightage is not the same as Tier 2. If you are aiming for the full CGL, plan for both.
• Studying by chapter forever. Chapter-wise study is right for the first pass. After that, mixed sets are what the exam looks like.
• Chasing a "chapter-wise PYQ" count that is not linked to any source. If a table says "Trigonometry: 4.37 questions", ask how it was counted.

For the cutoff side of how many questions you can afford to miss, see the SSC CGL cutoff analysis, and for how time is split across sections, section-wise time management.

What to do this week

Take your last two full mocks and tag every maths question by chapter with correct, wrong or skipped. Compare it against the planning tables above. If any chapter with 3 or more expected questions is under 50% accuracy, give it the next week of your maths time. Do not redo chapters you are already good at.

FAQ

Which chapter has the highest weightage in SSC CGL maths? Arithmetic as a group, taken together, is the largest. Within it, percentage-based topics (percentage, profit and loss, discount, interest) and time-work-distance tend to be most frequent. Exact per-chapter counts are not official.

Is geometry compulsory for SSC CGL Tier 1? Not compulsory in the sense that you can pass without it, but it is roughly 3 questions per paper on average, and Tier 2 asks more. Leaving it out is a risk, not a saving.

Do the same weightage tables apply to CHSL? Broadly similar, with a slightly lower difficulty and a stronger emphasis on arithmetic and basic geometry and mensuration. Check the CHSL syllabus in the notification.

How reliable are shift-wise weightage PDFs from YouTube channels? They are useful as directional guides but based on manual tagging by memory or from memory-based papers. Verify with a couple of sources before treating any figure as firm.

Should I skip trigonometry for Group D? Group D is Class 10 level, so basic trigonometry can appear, but heavy emphasis is rare. Learn the ratios and standard values, and give more time to arithmetic.

How many maths questions can I skip in Tier 1 and still clear? It depends on the cutoff of that year, category and normalisation. See the cutoff post for how to think about it instead of relying on a single number.