One Day Before CBSE Class 12 Maths Exam 2026: What to Revise for Maximum Marks

CBSE Class 12 Maths Exam 2026 scheduled on 9th March 2026, and this is the most important time to stay calm and revise smartly. At this stage, you should not try to learn anything new. Instead, focus on strengthening key formulas, high-weightage chapters, and important concepts from the NCERT.

If you are wondering what to revise one day before the CBSE Class 12 Maths exam 2026, these detailed last-minute tips will help you plan your final 24 hours effectively and improve your confidence before entering the exam hall.

High-Weightage Units to Revise One Day Before the Exam

Before the CBSE Class 12 Maths Exam 2026, it is important to focus on high-weightage units that can help you score maximum marks. These chapters carry significant marks and are mostly formula-based. Check below to see which topics you should revise carefully.

1. Calculus (Most Important)

Calculus carries the highest weightage in the CBSE Class 12 Maths paper. It includes:

• Continuity and Differentiability

• Applications of Derivatives

• Integrals

• Applications of Integrals

• Differential Equations

What to Revise in Calculus

• Standard derivative formulas

• Chain rule, product rule, and quotient rule

• Derivatives of inverse trigonometric functions

• Increasing and decreasing functions

• Local maxima and minima

• Standard integration formulas

• Properties of definite integrals

• Area under the curve

• Variable separable differential equations

Go through your formula notebook carefully. Many 1-mark and 2-mark questions come directly from standard formulas. Also, revise important NCERT solved examples because CBSE often frames similar types of questions.

2. Matrices and Determinants

This unit is scoring and mostly formula-based.

Revise the following:

• Types of matrices

• Matrix multiplication

• Transpose of a matrix

• Adjoint and inverse of a matrix

• Properties of determinants

• Solving system of linear equations using matrices

Revise determinant properties carefully because they help in solving questions quickly. Practice at least two examples for finding inverse and solving linear equations.

3. Vectors and 3D Geometry

These chapters are concept-based but direct formula application is common.

Focus on:

• Dot product and cross product

• Direction cosines and direction ratios

• Equation of line in space

• Equation of plane

• Shortest distance between lines
  
  

Memorize formulas properly and revise solved examples from NCERT. Many questions in this unit follow a standard pattern.

4. Probability

Probability is generally scoring and direct.

Revise:

• Conditional probability

• Bayes’ theorem

• Random variables

• Mean and variance

• Probability distribution
  
  

Solve 3–4 important questions to refresh the concepts. Be careful with calculations.

5. Relations and Functions

Although not very lengthy, this chapter is important for short-answer questions.

Revise:

• Types of relations

• One-to-one and onto functions

• Composition of functions

• Inverse trigonometric identities

Important identities like
sin⁻¹x + cos⁻¹x = π/2
tan⁻¹x + cot⁻¹x = π/2

should be revised carefully.

What to Avoid One Day Before the Maths Exam

Many students make mistakes in the last 24 hours. Avoid these:

• Do not start a new chapter.

• Do not solve very difficult reference book problems.

• Do not compare your preparation with friends.

• Do not study continuously without breaks.

• Do not stay awake late at night.

Proper rest is very important for accuracy and concentration.

Smart 24-Hour Revision Plan

Here is a practical plan you can follow:

Morning

• Revise Calculus formulas

• Solve 4–5 derivative and integration problems

• Revise important properties
  
  

Afternoon

• Revise Matrices and Determinants

• Solve 2–3 important problems

• Go through the previous year important questions
  
  

Evening

• Revise Vectors and 3D Geometry formulas

• Practice 2 probability questions

• Check your formula notebook
  
  

Night

• Light revision only

• Revise identities and formulas

• Sleep at least 6–7 hours

Avoid heavy problem-solving at night.

Last-Minute Class 12 Maths Formula Checklist

Before sleeping, revise:

• All derivative formulas

• Integration formulas

• Determinant properties

• Vector formulas

• Probability formulas

• Important identities

If your formulas are clear, half the exam is already prepared.

Exam Hall Strategy for CBSE Class 12 Maths 2026

Your performance also depends on how you attempt the paper.

1. Read the question paper carefully in the first 10–15 minutes.

2. Attempt easy questions first.

3. Show complete steps because step-wise marking is followed.

4. Do not skip rough work; use margins properly.

5. Keep 10–15 minutes at the end for rechecking calculations.

Time management plays a key role in scoring above 90.

Importance of NCERT for Class 12 Maths Exam

One day before the CBSE Maths exam, focus mainly on:

• NCERT solved examples

• NCERT exercises

• Important previous year questions

CBSE strictly follows NCERT patterns. Avoid spending time on unrelated advanced problems.