Automatic Answer Key + Step-Marking Scheme as a Separate Document
A complete examiner's answer key with step-wise marks for every part, ready as its own PDF.
Works on any free AI · Best tool: Claude (free) or ChatGPT (free), paste into Word for PDF
✅ How to use this effectively
- 1. Paste the EXACT paper you set.
- 2. State total marks for cross-check.
- 3. Read the verification note it returns.
- 4. Copy into Word, export as PDF.
- 5. Keep this file separate from the paper.
- For a trustworthy answer key: paste the finished paper into a FRESH chat and ask it to solve and grade it as an unseen exam (it catches its own slips).
🔧 If it is not right, reply with this: If a step breakdown is vague, type: 'For Question [n], split the marks into specific awardable steps (formula = X marks, substitution = X, final answer = X) and show the exact value at each step.'
THE PROMPT
ROLE: Act as a chief examiner who writes official step-marking schemes (marking rubrics) for board mathematics papers.
CONTEXT: I teach [CLASS/GRADE] [SUBJECT] for [BOARD]. I am giving you a complete question paper. I need a SEPARATE answer-key document with full solutions and a step-wise marking scheme an assistant examiner could apply consistently.
YOUR TASK:
1. For every question and sub-part, give the complete worked solution.
2. Break each solution into awardable steps and assign marks to each step so the parts sum to that question's marks (e.g. correct formula = 1, correct substitution = 1, correct simplification = 1, final answer with unit = 1).
3. State the final answer clearly on its own line, with units where relevant.
4. Add 'Accept also:' notes for valid alternative methods or equivalent forms (e.g. accept 0.5 for 1/2).
5. Add 'Common error / no marks for:' notes flagging typical mistakes (e.g. sign error, missing unit).
6. End with a verification line per section and a grand-total check.
INPUT: Here is the full question paper: [PASTE THE ENTIRE PAPER]. Stated total marks = [TOTAL MARKS].
HOW TO WORK IT OUT: Solve each question independently and completely first. VERIFY every final answer by two independent methods where possible (e.g. solve algebraically AND check by substitution; or compute AND estimate to confirm reasonableness). Re-add the step marks for each question to equal its stated marks, then re-add all questions to equal [TOTAL MARKS]. Never invent values not derivable from the question. Keep mathematics legible in plain text: fractions a/b, powers x^2, roots sqrt(x), and show every intermediate line.
OUTPUT FORMAT (exact order, per question):
- Q[number]: Solution (numbered steps with marks in brackets per step).
- Final Answer: [value + unit].
- Accept also: [...].
- No marks for: [...].
After all questions: a 'Marks Reconciliation' block listing each section total and the grand total, ending with 'Grand total verified = [TOTAL MARKS]'.
RULES: Marks per question MUST match the paper exactly. If any question in the paper is ambiguous or unsolvable as written, flag it under a 'Setter Alerts' list at the top with a suggested fix instead of guessing. Keep formatting plain so it pastes cleanly into Word and exports as a PDF.
MATHS FORMATTING: Write ALL mathematics so it reads correctly in a normal chat and pastes cleanly into Word or Google Docs. Use plain readable notation - for example a/b for fractions, x^2 for powers, sqrt(x) for roots, and symbols like <=, >=, !=, +-, pi, theta, integral and sum. Do NOT output raw LaTeX or code such as \frac{}{}, \sqrt{}, x^{2}, $...$ or \( ... \) - these appear as broken symbols to a teacher in a free chat.
CONTEXT CHECK: Before you begin, if any [SQUARE-BRACKET] above is still empty, or I have not given you the question / photo / data you need, ask me for exactly those and wait - never guess, and never answer with the placeholder text still in brackets.
GROUND RULES (always follow): Do not invent statistics, percentages, marks distributions you were not given, exam cut-offs, solve-time figures, NCERT or textbook page/line numbers, citations, or historical exam data. If you are unsure of any fact or number, say so and clearly label it an estimate; keep established fact separate from your own inference. Every step must be mathematically correct and at the stated class/board/exam level.
SIGNATURE: End your ENTIRE response with exactly this footer block (keep the lines and symbols):
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🔗 Free tools & to reach me: https://jee-prompt-studio.pages.dev/
Questions, feedback or appreciation are always welcome.
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