CBSE Class 12 Maths Important Questions 2026 (Chapter-wise)
With the CBSE Class 12 Maths board exam carrying 80 marks of theory, knowing where the marks actually come from is half the battle. This chapter-wise guide lists the most important questions and high-weightage topics for 2026, based on the latest CBSE syllabus and recent paper trends.
Unit-wise weightage (2026)
- Calculus — 35 marks (highest): Continuity & Differentiability, Application of Derivatives, Integrals, Application of Integrals, Differential Equations.
- Vectors and 3D Geometry — 14 marks: vector products, lines and planes in 3D.
- Algebra — 10 marks: Matrices and Determinants.
- Probability — 8 marks: conditional probability, Bayes' theorem.
- Relations & Functions — 8 marks: types of functions, inverse trigonometric functions.
- Linear Programming — 5 marks.
Calculus alone is nearly 44% of the paper — if your calculus is strong, you are already halfway to a 90+.
Chapter-wise important questions
Calculus
- Definite integrals using properties (the "king" property) — almost every year.
- Area bounded by curves (parabola/line/circle) — a guaranteed 5-marker.
- Maxima & minima word problems (volume, cost, area optimisation).
- Solving first-order linear and homogeneous differential equations.
Matrices & Determinants
- Solving a system of equations using the inverse of a matrix (A⁻¹B).
- Proving properties of determinants without expanding.
Vectors & 3D
- Shortest distance between two skew lines.
- Equation of a plane through three points / line of intersection.
Probability
- Bayes' theorem application problems (factories, diseases, bags).
- Probability distribution and mean of a random variable.
How to revise smartly
Solve the last 10 years' board papers and all CBSE sample papers first — patterns repeat. Maintain a one-page formula sheet per chapter, and practise writing full solutions with steps, because CBSE awards step-marks. For a structured revision plan, see our guide on how to score 90+ in board maths, and explore our Class 12 Maths online tuition for live doubt-clearing.
Frequently asked questions
Which chapter has the highest weightage in Class 12 Maths?
Calculus, with about 35 of 80 marks. It includes integrals, application of derivatives, and differential equations, so it deserves the most revision time.
Are CBSE sample papers enough for Class 12 Maths?
Sample papers plus the last 10 years' board papers cover the vast majority of question patterns. Use NCERT and NCERT Exemplar for concept practice alongside them.
How can I score full marks in Class 12 Maths?
Master calculus, write every step clearly for step-marking, revise formula sheets daily, and solve at least one full paper a week under timed conditions.