10 Common Mistakes Students Make in Board Exams
Avoid the 10 most common mistakes in CBSE and ICSE board exams — from poor time management and blank answers to skipped diagrams and no final check.
Many students lose marks in board exams not because they don't know the answers, but because of exam technique — poor time management, missing diagrams, incomplete answers and unattempted questions. Fix these 10 mistakes and your score can rise without studying a single new topic.
The 10 Mistakes
1. Poor time management
What happens: you spend 15 minutes on one hard question, then rush through easier ones worth more marks in total.
Fix: budget a little over 2 minutes per mark — about 10 minutes for a 5-mark question. If you are stuck, write what you know and come back in your checking time.
2. Leaving questions blank
What happens: you skip questions entirely because you "don't know the answer".
Fix: never leave a question blank. Write the relevant formula, draw a diagram, give a definition or list related points — marking schemes give marks for correct steps and points.
3. Skipping diagrams
What happens: the question says "draw a labelled diagram" and you skip it to save time.
Fix: when a question asks for a diagram, it carries marks. Practise the key diagrams in your syllabus until you can draw them quickly.
| Subject (CBSE Class 10) | Diagrams to practise |
|---|---|
| Physics | Ray diagrams for mirrors and lenses, circuit diagrams, magnetic field lines |
| Biology | Heart, nephron, neuron, reproductive systems, digestive system, stomata |
| Chemistry | Electron dot structures, simple experimental set-ups |
| Social Science | Map work — 5 marks in total (History 2, Geography 3) |
4. Not showing steps in Maths
What happens: you work it out in your head and write only the answer. If the answer is wrong, there is nothing to give marks for.
Fix: Given → Formula → Substitution → Calculation → Answer (with units). Marking schemes give marks for correct steps.
5. Not reading the question carefully
What happens: you find the area when asked for the perimeter, or miss the word "not" in an MCQ.
Fix: underline the key words — "find the sum", "which is not correct" — and read the question twice before answering.
Practise exam technique, not just content
Super Tutor has chapter-wise practice quizzes with instant feedback, so you can spot your mistakes before the real exam.
Start free6. Writing too much for short questions
What happens: you write a paragraph for a 1-mark question and run short of time for a 5-mark one.
Fix: match length to marks — a sentence or two for 1 mark, a few clear points for 3 marks, a structured answer with a diagram where relevant for 5 marks — and follow any word limit in the paper.
7. Ignoring internal assessment
What happens: you neglect periodic tests, portfolios, practicals and projects during the year.
Fix: in CBSE Class 10, every main subject has 20 marks of internal assessment; in Class 12, subjects have 20 or 30 marks of practicals, projects or internal assessment. These marks are within your control — take them seriously.
8. Cramming the night before
What happens: you study until 2 am, sleep four hours and wake up unable to recall what you know.
Fix: revise only your formula sheets and notes the evening before, and get a full night's sleep. A rested brain recalls far more.
9. Not checking the paper
What happens: you finish with time left and sit idle, while calculation errors, missing diagrams and unanswered sub-parts remain.
Fix: never stop early. Check for unanswered questions, recheck calculations and signs, add missing diagrams and units, and underline key terms.
10. Poor answer formatting
What happens: long, unstructured blocks of text make it hard for the examiner to find your points.
Fix: use numbered points for multi-point answers, underline key terms, write question numbers clearly and leave space between answers.
Quick Checklist
| Before the exam | During the exam | Last 15 minutes |
|---|---|---|
| ✓ A full night's sleep | ✓ Use the reading time to plan | ✓ Check for unanswered questions |
| ✓ A light breakfast | ✓ Start with confident questions | ✓ Recheck calculations |
| ✓ Admit card, extra pens and pencils, geometry box | ✓ Keep to time by marks | ✓ Add missing diagrams and units |
| ✓ A quick look at formula sheets | ✓ Show all steps in Maths | ✓ Underline key terms |
| ✓ Reach before the reporting time on your admit card | ✓ Draw diagrams where asked | ✓ Attempt any skipped questions |
| ✓ Check the admit card for permitted items | ✓ Attempt every question | ✓ Don't stop early |
General exam-technique guidance. Internal assessment and map marks from the CBSE Curriculum 2026-27 (cbseacademic.nic.in). Phones, smartwatches and other electronic devices are not allowed — follow the list of permitted items on your admit card.
Turn this into exam marks
Super Tutor gives you chapter summaries, revision notes, practice quizzes and an AI doubt solver matched to your board syllabus — so you revise smarter, not longer.
Start freeFrequently Asked Questions
What is the most common mistake in board exams?
Poor time management. Students spend too long on a hard question and then rush the easy ones or leave them unanswered. Budget a little over 2 minutes per mark, and if you are stuck, write what you know and come back later.
How many marks do silly mistakes cost?
It varies from student to student, but sign errors, missing units, skipped diagrams, incomplete answers and unattempted questions all cost marks that you already had the knowledge to earn. Timed practice with honest self-marking shows you which ones you make.
Should I attempt all questions even if I don't know the full answer?
Yes. Marking schemes give marks for correct steps and points, so a correct formula, a relevant diagram or a couple of correct points can earn something. A blank answer always scores zero.
Is it okay to write more than asked?
A little more is fine, but long answers to short questions waste time you need later. Match your answer to the marks and follow any word limit printed in the paper.
How do I avoid running out of time?
Start with questions you are confident about, keep to time by marks, and leave 15–20 minutes at the end for checking and skipped questions. Practise with timed papers so the pace becomes a habit.
Does handwriting affect board exam marks?
Marks are for content, but the examiner can only credit what they can read. Neat, legible writing with space between answers, underlined key terms and clean diagrams helps the examiner find every point.
What should I do if I go blank during the exam?
Don't panic — it happens to everyone. Move to the next question. Answers often come back once you are writing. If not, write the related formulas, definitions or diagrams you do know.
How do I handle questions I have never seen before?
Board papers now include many competency-based questions that apply ideas to new situations. Work out which chapter and concept the question is about, apply the basic principle, write the relevant formula or definition, and give a logical answer. A reasoned attempt can earn marks.