In this guide
Most JEE aspirants can recite the pattern: 75 questions, 300 marks, three hours. Far fewer have worked out what it implies. How much does a wrong answer really cost? Is a blind guess worth it? Why do two candidates who both score 180 feel so differently about their paper? This guide answers those questions, because the pattern is not background information. It shapes every decision you make in the hall.
What JEE Main is for
The Joint Entrance Examination (Main) is conducted by the National Testing Agency (NTA). Paper 1 is the entrance for B.E. and B.Tech at the National Institutes of Technology (NITs), Indian Institutes of Information Technology (IIITs) and other centrally funded technical institutions, with seats allotted through JoSAA counselling. Several state and private institutions also use JEE Main scores.
It is also the qualifying step for JEE Advanced, the entrance to the IITs. Only the top performers in Paper 1 become eligible to write it.
There are two other papers — Paper 2A for B.Arch and Paper 2B for B.Planning — with their own aptitude and drawing or planning sections. This guide covers Paper 1 only.
Paper 1 at a glance
| Feature | JEE Main Paper 1 |
|---|---|
| Mode | Computer-based test at an allotted centre |
| Duration | 3 hours |
| Subjects | Physics, Chemistry, Mathematics |
| Questions | 75 (25 per subject) |
| Total marks | 300 (100 per subject) |
| Languages | English, Hindi and several regional languages (choose at application) |
| Sessions | Two a year, usually January and April |
How each subject is built
| Section | Questions | Type | Marks |
|---|---|---|---|
| Section A | 20 | Multiple choice, four options, one correct | 80 |
| Section B | 5 | Numerical value: you type the answer | 20 |
| Subject total | 25 | All compulsory | 100 |
From 2021 to 2024, Section B had 10 numerical questions of which you chose 5. From the 2025 exam, NTA cut this to 5 questions, all compulsory. Older mock papers and coaching material may still show the old choice, so do not be confused by them.
The marking scheme
- +4 for a correct answer.
- −1 for a wrong answer, in both Section A and Section B under the current scheme.
- 0 for a question left unanswered or only marked for review.
If NTA drops a question after the answer-key challenge, recent bulletins award its marks to everyone; if more than one option turns out correct, credit goes to those who chose any correct option. The exact rules are printed in each year's bulletin.
The arithmetic of +4 and −1
A wrong answer costs one mark; a right one earns four. That asymmetry decides how you should treat doubtful questions.
Two candidates, same score.
- Candidate A attempts 60 questions: 48 right, 12 wrong. Score = 48 × 4 − 12 = 192 − 12 = 180.
- Candidate B attempts 70 questions: 50 right, 20 wrong. Score = 50 × 4 − 20 = 200 − 20 = 180.
Candidate B answered two more questions correctly but lost the gain to eight extra wrong answers. Accuracy and attempts trade off against each other, and your mocks tell you where your balance lies.
What is a guess worth? For a four-option MCQ, the average gain from attempting is (chance right × 4) − (chance wrong × 1).
| Situation in Section A | Chance of being right | Average gain per attempt |
|---|---|---|
| Blind guess, all four options possible | 1 in 4 | 1 − 0.75 = +0.25 |
| One option ruled out | 1 in 3 | 1.33 − 0.67 = +0.67 |
| Two options ruled out | 1 in 2 | 2 − 0.5 = +1.5 |
| Numerical question, no real method | close to 0 | close to −1 |
The break-even point is a 1-in-5 chance of being right: 4p − (1 − p) = 0 gives p = 0.2. Any MCQ where you can honestly rule out an option is worth attempting on average. A numerical answer typed without a method almost always loses a mark.
Sessions, shifts and normalisation
Each session runs over several days, with two shifts on most days, and every shift has a different question paper. Some shifts will be harder than others. To keep things fair, NTA converts your raw marks into an NTA score — a percentile within your own shift — and then merges shifts.
If you appear in both sessions, the better of your two NTA scores is used for your rank. Our guide to JEE Main percentiles and normalisation explains the calculation with worked examples.
What the pattern means for preparation
Balance the three subjects. Each carries exactly 100 marks. A candidate scoring 85, 80 and 15 totals 180, the same as one scoring 60, 60 and 60 — but the first has put everything at risk on two subjects. A very weak subject is also the cheapest place to find marks, because the easy questions in it are still unclaimed.
Speed is a skill. Three hours for 75 questions is 2.4 minutes each on average, but questions do not take equal time. Many chemistry questions take under a minute when you know the fact; some maths questions need five. Our time strategy guide shows how to plan the three hours.
Numerical questions need finishing power. With no options to check against, a sign error or a wrong unit costs you the mark and one more. Practise solving to a final number, not just to "the method is clear". See numerical value questions.
NCERT matters most in chemistry. Inorganic chemistry and a large part of organic chemistry follow NCERT closely, and many questions test a line or a table from the textbook.
Two sessions are two chances. Take the January session seriously. It is a real attempt, and it is the most honest mock you will ever write for April.
Common mistakes about the pattern
- Practising with old-pattern papers without adjusting. When you use pre-2025 papers, attempt only five numerical questions per subject and mark them with −1 for errors.
- Treating "mark for review" as an answer. A question marked for review without a selected answer is not evaluated. Check your platform's rule in the bulletin and in NTA's mock interface.
- Skipping the on-screen instructions. Each numerical question may say how to enter the value. Read it.
- Ignoring the computer format. Reading long questions on a screen and working on rough sheets feels different from a printed paper. Practise that way.
Quick self-test
- How many numerical value questions must you answer in the whole paper?
- A candidate has 52 correct and 18 wrong answers. What is the score?
- You can rule out one option in an MCQ. Is attempting worth it on average?
- You have no method for a numerical question and are thinking of typing "2". What is the likely effect?
Answers
- 15 — five per subject, all compulsory.
- 52 × 4 = 208; 208 − 18 = 190.
- Yes. With three options left, the average gain is 4/3 − 2/3 = +0.67.
- Almost certainly −1. Without options, the chance of guessing the exact value is tiny.
What to do next
- Download this year's NTA Information Bulletin and read the pattern and marking sections yourself.
- Take one full-length paper in 3 hours on a computer, under the current 20 + 5 format.
- Note your score by subject and by section (A and B) separately.
- Check your eligible years and the Class 12 condition for NIT and IIIT admission.
A note on dates and numbers. Exam patterns, vacancies and schedules change from year to year. Always confirm the current details in the latest notification on the National Testing Agency website .
Get the next JEE Main guide by email
New guides every week. No spam, unsubscribe any time.