CBSE Class 12 Maths Important Chapters 2027 (From Board Papers)
Most important chapters for CBSE Class 12 Maths boards 2027, with marks per chapter from 8 real board papers (2023–2026) and which chapters repeat. Free…
Short answer: in recent CBSE Class 12 Maths board papers, the chapters carrying the most marks are Integrals (about 16.6 marks per paper), Relations & Functions (about 7.5 marks per paper), Probability (about 6.8 marks per paper). Together these three make up about 48% of the chapter-tagged marks in the 80-mark theory paper. The table below is calculated from 8 real CBSE board papers (2023–2026), not guessed.
Chapter-wise weightage: Class 12 Maths
| # | Chapter | Avg marks per paper | Share |
|---|---|---|---|
| 1 | Integrals | 16.6 | 26% |
| 2 | Relations & Functions | 7.5 | 12% |
| 3 | Probability | 6.8 | 11% |
| 4 | Applications of Derivatives | 5.8 | 9% |
| 5 | Vectors | 5.4 | 8% |
| 6 | Linear Programming | 4.9 | 8% |
| 7 | Matrices | 4.8 | 7% |
| 8 | Differential Equations | 3.5 | 5% |
| 9 | Three Dimensional Geometry | 2.1 | 3% |
| 10 | Continuity & Differentiability | 2.1 | 3% |
| 11 | Applications of Integrals | 1.9 | 3% |
| 12 | Determinants | 1.6 | 3% |
| 13 | Inverse Trigonometric Functions | 1.2 | 2% |
Method: each question in the 2023–2026 board papers (two sets per year) is tagged to its NCERT chapter. Marks are added up per paper and averaged. Tagging is automated, so treat each figure as roughly ±1 mark. Full methodology.
Which chapters to revise first
Must-do: about 10% of the paper or more each
Integrals, Relations & Functions, Probability. Revise these first and solve every previous year question on them.
High value: 5–10% each
Applications of Derivatives, Vectors, Linear Programming, Matrices, Differential Equations. Cover these thoroughly after the must-do chapters.
Lower weightage: under 5% each
Three Dimensional Geometry, Continuity & Differentiability, Applications of Integrals, Determinants, Inverse Trigonometric Functions. Don't skip them: they still add up and often carry quick one-mark questions.
Do questions repeat in Class 12 Maths?
Comparing all 329 Class 12 Maths board questions from 2022–2026, 28 were asked again, in near-identical form, in a different board year, most often from Linear Programming, Differential Equations, Integrals. That makes previous year papers especially valuable in this subject.
The most repeated questions, with the years they appeared, are listed on the CBSE Class 12 Maths previous year papers page.
192 CBSE board papers split into single questions with official answers, chapter-wise practice and unlimited mock papers. 100% free: no ads, no paid plan, no hidden charges.
How to use this list
- Start with the must-do chapters. Read the NCERT chapter, then solve its previous year board questions and check them against the marking scheme.
- Don't drop any chapter. Weightage is an average: any chapter can carry a long question in your paper.
- Finish with full papers. In the last 6 weeks, take full timed board-pattern papers. BoardPrep's free mock generator makes a new one each time, with an answer key.