Class 10 Board: Top 10 Common Mistakes to Avoid in Class 10 Maths
GyanSanchar · 1 Oct 2026
Creating a high-scoring strategy for the Class 10 Math Board Exams 2027 isn't just about what you learn; it’s about what you don't do. Even top students often lose marks due to avoidable errors.
To help you reach that 90%+ target, here are the top 10 common mistakes to avoid.
1. Skipping the NCERT Basics
Many students chase advanced reference books while ignoring the NCERT textbook.
- The Mistake: Neglecting NCERT examples and miscellaneous exercises.
- The Fix: Over 80% of the paper is based on NCERT concepts. Solve different questions to master concept.
2. Misreading the Question
Under the pressure of the exam hall, it's easy to misinterpret what is being asked.
- The Mistake: Finding the "Radius" when the question asks for the "Diameter," or missing a "NOT" in an MCQ.
- The Fix: Use your 15-minute reading time to underline key figures and specific requirements in each question.
3. Ignoring Units and Conversions
This is the king of how to avoid silly mistakes in Maths.
- The Mistake: Calculating volume with height in cm and radius in m without converting them to a uniform unit.
- The Fix: Always write the units (cm, m, kg) in your final answer. No unit = lost half mark!
4. Poor Time Management
Spending too much time on a 2-mark question can leave you rushing through the 5-mark Case Studies.
- The Mistake: Not having a "time-per-section" plan.
- The Fix: * Section A (MCQs): 1-2 mins per question.
- Section E (Case Studies): 10 mins per case study.
5. Overlooking the "New Pattern" MCQs & Case Studies
The 2026 pattern emphasizes Competency-Based Questions.
- The Mistake: Practicing only direct formula-based questions.
- The Fix: Solve at least 10-15 Case Study-based questions for chapters like Surface Areas and Volumes, and Statistics.
6. Messy Rough Work
Your rough work is where most calculation errors happen.
- The Mistake: Scribbling numbers all over the page, leading to "copying errors" (e.g., writing your own '7' as a '1').
- The Fix: Draw a margin on the right side of your answer sheet for organized rough calculations.
7. Direct Final Answers (Skipping Steps)
CBSE marks are awarded for steps, not just the final result.
- The Mistake: Jumping from the formula directly to the answer.
- The Fix: Even if your final answer is wrong, correct steps can fetch you 1.5 out of 2 marks. Always state the formula used.
8. Not Checking the Sign (+/-)
Calculations in Algebra and Coordinate Geometry are highly sensitive to signs.
- The Mistake: Shifting a term to the other side of the "=" without changing its sign.
- The Fix: Re-verify the sign of your values in the very next line of your calculation.
9. Lack of Presentation in Geometry
Geometry is about logic and visual clarity.
- The Mistake: Not drawing a figure or forgetting to write "Given" and "To Prove."
- The Fix: Use a sharp pencil and ruler for diagrams. A neat diagram creates a positive impression on the examiner.
10. Forgetting the Revision Buffer (Most Important)
Turning in your paper the moment the bell rings is a recipe for disaster.
- The Mistake: Not leaving time to re-check calculations.
- The Fix: Aim to finish the paper 15 minutes early. Use this time specifically to check for "silly mistakes" like calculation errors or missing units.
Pro-Tip for 2026:
Treat your Sample Papers as real exams. Practicing in a timed environment is the only way to build the stamina required for the Board Exam.
Even the best-prepared students can lose 5-10 marks due to avoidable errors. At Gyansanchar, we’ve analyzed hundreds of answer sheets to identify where students go wrong.
The Gyansanchar Edge: Our "Mock Test" series don't just give you a score; we make you learn every "silly mistake" so you never repeat it in the actual Board hall.
Would you like me to create a 14-day study schedule specifically tailored to cover these high-risk areas? Connect with our Academics expert over WhatsApp