IIT M.Tech Admission – Foundation & Exam Strategy
Topic: Marking Scheme
Purpose of this note – Understand how the exam is scored so you can plan your attempt strategy, manage time, and minimise the impact of negative marking.
1. Simple Explanation
| Item | What Happens | Example |
|---|---|---|
| Correct answer | +3 marks | 3 marks for a right answer |
| Incorrect answer | –1 mark | –1 mark for a wrong answer |
| No attempt | 0 marks | Blank answer = 0 |
Total marks = 3 × (correct answers) – 1 × (incorrect answers)
(Blank answers contribute nothing.)
Key point – The marking scheme is uniform across all papers (Math, Physics, Chemistry, etc.) in the IIT‑M.Tech entrance test.
2. Key Points to Remember
| # | Key Point | Why It Matters |
|---|---|---|
| 1 | Each correct answer yields +3 marks | Maximises score – aim to answer the questions you’re confident about. |
| 2 | Each wrong answer costs –1 mark | Avoid guessing blindly; use elimination techniques. |
| 3 | No penalty for leaving a question blank | Use this to your advantage when unsure. |
| 4 | Total marks per paper (usually 300 marks) | Helps estimate required correct answers: 300 ÷ 3 = 100 correct answers for a perfect score. |
| 5 | Negative marking is not severe | The penalty is only 1 mark, so a well‑balanced guess can still be worthwhile if you’re reasonably sure. |
| 6 | Time management | You have ~3 minutes per question on average; allocate time to skip uncertain questions early. |
| 7 | Practice with time & marking | Simulate exams with the same scheme to build confidence. |
3. Worked Example
Scenario
- Total questions: 100
- Student answers: 60 questions
- Correct: 45
- Wrong: 10
- Blank: 45 (i.e., 60 answered, 40 blank)
Calculation
[ \text{Score} = (45 \times +3) ;+; (10 \times -1) ;+; (45 \times 0) \ \text{Score} = 135 ;-; 10 ;+; 0 \ \text{Score} = 125 \text{ marks} ]
Interpretation
- You earned 125/300 marks.
- If you had guessed on all 40 blanks, you might have gained an average of +0.2 marks per guess (since (3-1 = 2) net gain if correct, –1 if wrong).
- But without data on guessing accuracy, it’s safer to leave blanks when you’re not sure.
4. Quick Revision Summary
| Item | Remember |
|---|---|
| Correct | +3 marks |
| Wrong | –1 mark |
| Blank | 0 marks |
| Total marks | 300 (100 questions × 3) |
| Strategy |
- Triage: Answer high‑confidence questions first.
- Eliminate: Reduce wrong guesses by eliminating options.
- Skip: Leave truly uncertain questions blank. | | Practice tip | Use mock tests and calculate your score with the same scheme to see the impact of guessing. |
Final Thought
Knowing the marking scheme gives you a quantitative advantage. Treat every question as a decision problem: Is the expected value of guessing positive? If you’re not 60 % confident, skip. If you’re 70 % confident, it’s a net +1.2 marks per guess. Use this rational approach to maximize your IIT M.Tech exam score. Happy studying!