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CBSE Class 10 Maths Exam: What To Revise Before The Exam And Common Mistakes To Avoid
CBSE Class 10 Maths Exam: What To Revise Before The Exam And Common Mistakes To Avoid
By Shweta Choudhary, Gautam Thakral & Sahil Rawal
Every year, when the Class 10 Mathematics paper ends, students walk out with the same mixed feeling: relief, followed closely by doubt. “The paper wasn't hard," many say. “But it was tricky." That word, tricky, is revealing. In Mathematics, marks are rarely lost because students do not know the syllabus. They are lost because students misjudge how CBSE frames familiar ideas and how carefully they execute what they already know.
As the 2026 board examination approaches, the focus must therefore shift from the quantity of revision to the quality of recall and the precision of method.
Which Chapters Actually Decide Scores
Although the syllabus is uniform, all chapters do not contribute equally to the final score. Over the years, certain units have consistently formed the backbone of the paper: Polynomials, Quadratic Equations, Arithmetic Progressions, Triangles, Circles, Trigonometry, Coordinate Geometry and Statistics. These chapters test not only conceptual understanding but also the ability to sustain logical steps without losing accuracy.
For instance, in Polynomials, students know the relationship between zeroes and coefficients, yet marks are lost through hurried substitution. In Arithmetic Progressions, confusion between the nth term and the sum of n terms leads to incorrect formula selection. In Trigonometry, identities are memorised, but proofs fail because students begin from both sides instead of logically transforming expressions. This small misconception repeatedly costs method marks.
The Only Books That Truly Matter
Despite the wide range of reference material available, CBSE continues to anchor its questions firmly in the NCERT textbooks, the NCERT Exemplar, and the official CBSE Competency-Based Question Bank and Sample Papers. NCERT examples define the language and presentation of solutions, while Exemplar problems set the depth of reasoning and application.
The CBSE question bank and sample papers reflect how concepts are now tested through case-study, assertion–reason and multi-step competency-based questions. Many board questions are structured adaptations of these resources, not in wording but in thinking pattern.
In the final phase of preparation, solving full-length sample papers becomes essential. Attempting at least 8 to 10 timed papers helps students build speed, accuracy and exam stamina, while also training them to manage time and maintain clarity of method under pressure.
Formulas Students Know But Misuse Under Pressure
In the examination hall, students seldom forget formulas. The real difficulty lies in selecting and applying the correct one under stress. In Quadratic Equations, the discriminant is often ignored when students are asked about the nature of roots. In Coordinate Geometry, the distance or section formula is written correctly, but sign errors occur during substitution. In Statistics, many students assume the mean formula applies in all situations, overlooking cases that clearly demand the median or mode, especially when missing frequencies are involved.
What strengthens recall here is not rote learning, but pattern recognition, the ability to quickly identify which type of question calls for which method.
What CBSE Repeats Subtly
CBSE rarely repeats questions verbatim. It repeats structures: word problems in Algebra, proof-based reasoning in Triangles, tangent properties in Circles, mixed-concept tables in Statistics, and application-based problems in Heights and Distances. Students who recognise these familiar frameworks approach the paper with greater composure and better time control.
What To Revise In The Last 24 Hours
The final day should be used for consolidation, not exploration. This is the time to revise key formulas and identities, standard theorems and proofs, construction steps, and one solved example of each major question type. Personal error patterns from previous tests should be revisited, along with diagrams, sign conventions, units and the expected presentation style.
New shortcuts and fresh question banks should be avoided, as they increase anxiety and disrupt recall.
During The Examination
One of the costliest habits is abandoning a question too early. CBSE's marking scheme rewards method. Even partial progress, such as writing the given data, drawing a labelled figure or stating a relevant formula, can earn credit. A calm, step-wise approach often secures more marks than hurried completion.
Where Marks Are Commonly Lost
Across evaluated answer scripts, marks are most often lost due to skipped reasoning steps, incorrect substitution of values and failure to state results clearly. In Geometry, missing reasons in proofs or inaccurately drawn figures weaken otherwise correct solutions. In Algebra, confusion between similar formulas, such as aₙ and Sₙ in Arithmetic Progressions, or neglecting the discriminant in Quadratic Equations, leads to loss of method marks. These are not conceptual gaps, but lapses in sequence, clarity and verification.
The Human Side Of Preparation
No amount of practice can compensate for a tired or anxious mind. Adequate sleep of seven to eight hours is essential for concentration and memory. Preparation should follow a realistic timetable, with NCERT as the core text, supported by regular revision, short notes and formula sheets. Solving previous years' papers, including compartment papers, sharpens familiarity with question patterns and common traps. Writing full solutions within time limits improves both speed and presentation.
Most importantly, students must remain calm, avoid unhealthy comparison and trust their preparation. Mathematics in the board examination is not a test of speed; it is a test of steadiness.
A Final Thought
The Class 10 Mathematics paper does not reward clever shortcuts. It rewards clarity of thought, consistency of method and control under pressure. Students who slow down, organise their work carefully and present their reasoning step by step often score higher than those who rush. In the final stretch, confidence built on sound preparation and composed execution becomes the true differentiator.
(The authors are Math Educators at Shiv Nadar School, Faridabad. The views expressed above are personal and solely those of the authors and do not necessarily reflect the views of News18.)
Source: News18
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