How to Score 100/100 in Maths — Board Exam Guide
Step-by-step strategy to score full marks in CBSE Maths board exam. Practice routine, common mistakes, time management, and presentation tips for 100/100.
Maths is the easiest subject to score 100/100 in because every question has a definite answer with step-wise marking. The strategy: solve 20+ problems per chapter daily, show every step, memorise all formulas, and solve 10+ previous year papers. Thousands of CBSE students score full marks in Maths every year. Here is exactly how they do it.
Why 100 in Maths Is Achievable (When 100 in English Is Not)
Unlike subjective subjects where examiners judge answer quality, Maths has objective marking:
- Clear marking points: Each step has designated marks. Correct formula = 1 mark. Correct substitution = 1 mark. Final answer = 1 mark.
- No subjective judgement: Either your answer is right or wrong. No "partial credit based on expression."
- Predictable questions: CBSE Maths papers follow consistent patterns. If you solve 5 previous year papers, you will recognise 70%+ of question types.
- Internal assessment boost: 20 marks from internal assessment (periodic tests + notebook) are nearly guaranteed at 18–20/20 for diligent students.
The Daily Practice Routine
| Time | Activity | Duration |
|---|---|---|
| Morning | Revise formula sheet (write formulas from memory, then check) | 10 minutes |
| Study Session 1 | Solve 10 new problems from current chapter (NCERT or R.D. Sharma) | 45 minutes |
| Study Session 2 | Solve 5 problems from a previously completed chapter (spaced repetition) | 20 minutes |
| Before bed | Quick mental recall: can you write all formulas from today's chapter without looking? | 5 minutes |
Total Maths time: ~80 minutes daily. This is non-negotiable. Maths requires daily practice — you cannot cram it.
Chapter-Wise Strategy — CBSE Class 10
| Chapter | Marks | Strategy for Full Marks |
|---|---|---|
| Real Numbers | ~6 | HCF/LCM by prime factorisation. Euclid's division lemma. 2 days to master. |
| Polynomials | ~4 | Zeroes of polynomial, division algorithm. Solve 15 problems. 2 days. |
| Pair of Linear Equations | ~6 | All 5 methods (graphical, substitution, elimination, cross-multiplication, reduction). Word problems are key. |
| Quadratic Equations | ~7 | Factorisation + quadratic formula. Discriminant conditions. Solve 25+ word problems. |
| AP (Arithmetic Progression) | ~7 | nth term + sum formulas. Word problems on AP are guaranteed 5-markers. Solve 20+ problems. |
| Triangles | ~8 | All similarity criteria (AA, SAS, SSS). BPT theorem with proof. Solve proof-based questions. |
| Coordinate Geometry | ~6 | Distance, section, midpoint, area formulas. Direct application — memorise and practise. |
| Trigonometry | ~12 | Highest weightage. Memorise all identities. Prove 30+ identity questions. Heights & Distances application problems. |
| Circles | ~4 | Tangent properties. 2–3 standard proof types. Quick chapter. |
| Constructions | ~4 | Practise with compass. Dividing line segments, tangents to circles. Easy marks. |
| Areas Related to Circles | ~4 | Sector/segment area formulas. Combination problems. Memorise and apply. |
| Surface Areas & Volumes | ~6 | All formulas on one sheet. Combination of solids problems. Practise 15+ problems. |
| Statistics | ~8 | Mean (3 methods), median, mode. Guaranteed marks — easiest chapter. Solve 10 problems. |
| Probability | ~3 | Basic probability. Straightforward — solve 10 problems. |
Get chapter-wise Maths practice
Super Tutor has CBSE Maths practice quizzes, formula sheets, and worked examples for every chapter — with instant feedback on your solutions.
Practise Maths — FreeThe Formula Sheet Strategy
Create a master formula sheet (2 pages for Class 10, 4 pages for Class 12) and follow this routine:
- Week 1: Create the sheet as you complete each chapter. Write every formula with a brief note on when to use it.
- Daily: Every morning, try to write all formulas from memory. Check against your sheet. Mark the ones you forgot.
- Last 2 weeks: Revise the formula sheet 3 times daily — morning, afternoon, evening.
- Exam day: Quick 10-minute glance at the formula sheet before leaving home.
By exam day, you should be able to write every formula in the syllabus from memory in under 10 minutes. If you cannot, you have not practised enough.
Answer Presentation for Full Marks
| Step | Example (Quadratic Equation) | Marks |
|---|---|---|
| 1. Write "Given" | Given: x² + 5x + 6 = 0 | — |
| 2. Write formula/method | Using factorisation method / Using quadratic formula: x = (-b ± √(b²-4ac)) / 2a | 1 mark |
| 3. Substitute values | Here a = 1, b = 5, c = 6 | 1 mark |
| 4. Show calculation | x = (-5 ± √(25-24)) / 2 = (-5 ± 1) / 2 | 1 mark |
| 5. Write final answer | x = -2 or x = -3 | 1 mark |
| 6. Verify (if asked) | Check: (-2)² + 5(-2) + 6 = 4 - 10 + 6 = 0 ✓ | — |
Top 10 Silly Mistakes That Cost Marks
- Sign errors: -(-3) = +3, not -3. Double-check every sign change.
- Forgetting units: Area in cm², volume in cm³, speed in km/h. Missing units can cost 0.5–1 mark.
- Not reading the question fully: "Find the sum" vs "Find the number of terms" — students solve the wrong thing.
- Calculation errors in fractions: Simplify step by step, not in your head.
- Forgetting ± in square roots: √25 = ±5 in equations, not just +5.
- Leaving answers as fractions when decimals are expected (or vice versa).
- Not drawing diagrams for geometry/mensuration questions — costs 1–2 marks.
- Skipping the "hence proved" statement in proof questions — examiners specifically look for this.
- Wrong formula recalled: Area of circle = πr² (not 2πr, which is circumference).
- Not attempting questions: A partially correct answer scores 2–3 marks. A blank scores 0.
The Last 7 Days Before Maths Exam
| Day | Activity |
|---|---|
| Day 7 | Solve 1 full previous year paper (timed). Mark and analyse mistakes. |
| Day 6 | Revise ALL formulas. Solve 10 problems from your weakest chapters. |
| Day 5 | Solve another full paper. Focus on time management — finish in 2.5 hours. |
| Day 4 | Revise Trigonometry identities + Calculus formulas (highest weightage). |
| Day 3 | Solve 1 more paper. This should feel comfortable now. |
| Day 2 | Only formula revision. Read through your mistake log from previous papers. |
| Day 1 (exam eve) | Light formula glance in the morning. Stop by 3 PM. Pack materials. Sleep by 10 PM. |
Chapter weightages based on CBSE 2025–2026 marking scheme. Minor variations may occur. Presentation format follows CBSE examiner guidelines. Last updated: February 2026.
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Try Super Tutor — It's FreeFrequently Asked Questions
Is it possible to score 100/100 in Maths board exam?
Yes. Maths is the easiest subject to score 100 in because every question has a definite correct answer with step-wise marking. Unlike subjective subjects where examiners judge answer quality, Maths has clear marking points. If your method is correct, steps are shown, and the final answer is right — you get full marks. Thousands of students score 100/100 in CBSE Maths every year.
How many hours should I practise Maths daily?
Minimum 1.5–2 hours daily for Maths alone (not combined with other subjects). Maths cannot be crammed — it requires daily problem-solving to build speed and accuracy. In the last 2 months before boards, increase to 2–3 hours daily. Practise problems by hand — not just reading solutions.
Which chapters are most important for Maths board exam?
For CBSE Class 10: Trigonometry (~12 marks), Statistics & Probability (~11 marks), Algebra (~20 marks), and Mensuration (~10 marks) together cover 53+ marks. For Class 12: Calculus (~35 marks) is the single biggest unit. Focus on high-weightage chapters first, then cover the rest.
How to avoid silly mistakes in Maths?
5 rules to eliminate silly mistakes: (1) Always write the formula before substituting values, (2) Double-check signs (+ and −) — the most common error source, (3) Write units in the final answer, (4) Re-read the question after solving to ensure you answered what was asked, (5) Keep 15 minutes at the end to verify calculations in high-value questions.
Should I show all steps even if I can solve mentally?
Yes, always. CBSE gives step-wise marks — even if your final answer is wrong, correct intermediate steps earn marks. A 5-mark question might have 5 separate marking points: formula (1 mark), substitution (1 mark), simplification (1 mark), calculation (1 mark), final answer (1 mark). Skipping steps risks losing 3–4 marks per question.
How to manage time in Maths board exam?
For an 80-mark, 3-hour paper: Spend 10 minutes reading and planning. Allocate 2 minutes per mark (a 5-mark question gets 10 minutes). Start with Section A (1-mark questions) for quick marks and confidence. Then attempt questions you are most confident about. Keep 15–20 minutes for revision. Never spend more than 12 minutes on any single question.
Is R.D. Sharma enough for scoring 100 in Maths?
NCERT + R.D. Sharma is more than enough for 100/100 in boards. Solve ALL NCERT exercises first (board questions come from these). Then solve R.D. Sharma for extra practice. Also solve 5–10 previous year papers. You do not need any other book for board exam Maths.
What if I get stuck on a question during the exam?
Do not spend more than 8 minutes on any question. If stuck: (1) Write the formula and whatever steps you know — partial marks are awarded, (2) Move to the next question, (3) Come back to it in the revision time at the end. A blank answer scores 0. A partially correct attempt can score 2–3 out of 5. Always attempt every question.