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Mocks · Method
To analyse a mock test, spend longer on the review than you did worrying about the score: reattempt every wrong question cold, label each error as a concept gap, a silly error or time pressure, count the marks each chapter cost you, and let those two numbers — tag and marks lost — decide what you practise next week. A score you do not act on is just a number.
Quick answer
Do this the same day, while you still remember what you were thinking during each question. A mock analysed two days later loses most of its value.
0–10 min
Correct, wrong, and left blank. Separately mark the ones you got right but were not sure about — those are the questions that will go wrong next month, and they are invisible in the score.
10–40 min
No solution, no notes, no clock pressure. Some you will now solve, and those are not concept gaps. The ones you still cannot solve are the real content of this mock.
40–70 min
One row per wrong or unsure question: chapter, what went wrong in one line, the tag, and the marks it cost. Check the method even where your answer was right.
70–90 min
Total the marks lost per chapter and per tag. The top two chapters and the dominant tag decide what your practice looks like for the next seven days.
Because the score tells you the size of the problem and nothing about its shape. Two students both score 180 in a JEE Main mock: one lost marks across four chapters she has never properly studied, the other knew almost everything and lost thirty marks to arithmetic in the last twenty minutes. The same number, and completely different work to do next week.
A second reason is that solutions are seductive. Reading a worked solution produces a strong feeling of understanding — the steps are all reasonable, each one follows from the last — which is exactly the feeling you will not have when the same question appears under time. That is why reattempting cold comes before reading anything.
BrainStride is an AI tutor for JEE, NEET and Olympiad preparation that runs a 20-minute diagnostic, maps your weak chapters and writes a daily plan, with every solution checked by teachers. A mock is where that record gets its sharpest data, because everything happens under real time pressure.
Longer than most students give it, and less than it sounds. Ninety minutes of structured review after a three-hour paper is a reasonable ratio. If your analysis is finished in fifteen minutes, you checked answers; you did not analyse.
One row per question you got wrong or were unsure about. Paper or spreadsheet, it does not matter — what matters is that the same log survives across mocks so patterns can show up in it. The rows below are an illustration, not data from a real student.
| Q | Chapter | What went wrong | Tag | Marks |
|---|---|---|---|---|
| 7 | Rotational motion | Used mgsinθ for friction on an incline | Concept gap | −5 |
| 14 | Current electricity | Right circuit, dropped a factor of 2 in the algebra | Silly error | −5 |
| 23 | Definite integrals | Knew the substitution, ran out of time at 2 min 40 | Time pressure | 0 |
| 41 | Electrochemistry | Nernst sign convention reversed | Concept gap | −5 |
| 58 | Coordinate geometry | Solved correctly, entered against the wrong question | Silly error | −5 |
Marks shown as −5 are the full swing of a careless wrong answer under +4/−1 marking: four marks not earned plus one deducted. A blank costs 0 but still costs the four marks you could have had.
BrainStride tags every wrong answer for you and writes the next practice set around the tag. Start with the free 20-minute diagnostic.
The point of tagging is that the three causes need opposite responses. Doing more theory for a silly error, or more accuracy drills for a concept gap, is why mock scores plateau.
| Tag | What it means | This week | Not this week |
|---|---|---|---|
| Concept gap | The idea is missing or wrong | Reread the concept, work easy-to-medium questions in that chapter, then retry the mock question | Full-length timed sets in that chapter |
| Silly error | The method was right, execution was not | Short accuracy sets on the same chapter, one checking habit, units written at every step | More theory, or a new book |
| Time pressure | The clock, not the chapter, cost the marks | Timed sets and a rule for abandoning a question, practised in the next mock | Slow untimed practice on chapters you already know |
The method is the same; the arithmetic is different. NEET is 180 compulsory questions in 180 minutes, so time pressure shows up as unattempted questions rather than slow ones. Count them first, by subject. If Physics has the most, the fix is attempt order (Biology first, Physics last) and timed Physics sets, not more theory.
Then sort Biology errors separately from the rest. Most NEET Biology mistakes are a single NCERT line half-remembered — a diagram label, an exception, a number. For each one, find the exact sentence in the NCERT book and read the page around it; that is the whole remedy, and it takes two minutes a question. Our NCERT Biology method covers the reading side.
Finally, score the paper +4 / −1 and put the total into the NEET rank predictor so the number means something. A score of 560 on a 2025-difficulty paper and 560 on a 2024-difficulty paper are different ranks.
JEE Main has 75 compulsory questions, five numericals a subject, and the numericals are where analysis pays most. Separate them: a wrong numerical since 2025 costs −1 like any MCQ, and there is no option to eliminate, so a numerical error is usually either a concept gap or an arithmetic slip under time — tag it honestly.
Then look at the clock per subject. Most students lose JEE Main marks to Maths taking far more than its 60 minutes. Mark every question that took over four minutes; the chapters that keep appearing in that list need timed sets, and our JEE Main Maths test generator builds them.
Score it, convert with the percentile calculator, and record the chapter-wise marks lost in your error log. Three mocks in, the same two or three chapters will be at the top of that log — those are the ones the weak-chapter test method is for.
One mock is an anecdote; five mocks with the same log are evidence. Three patterns are worth watching for.
A chapter that keeps appearing. If rotational motion is in your top three chapters by marks lost in three consecutive mocks, that is not bad luck. It is the single highest-value thing you can fix, and it will keep paying because the paper asks about it every year.
A tag that dominates. If more than half your lost marks are tagged silly error, your problem is not the syllabus, and another month of theory will not change your score. If most are concept gaps, the opposite is true and accuracy drills are a distraction.
Where in the paper the errors sit. Mark the time you reached each question. Errors clustered in the last half hour mean the paper is being lost earlier — usually to two or three questions you should have left. Errors spread evenly mean the chapters, not the clock, are the issue.
Mark the ones you were unsure about, and treat a lucky right answer as a wrong one. A guess that lands still counts as +4 today and as a concept gap tomorrow. Students who only review wrong answers keep being surprised by questions they "already knew".
By making it arithmetic instead of judgement. Marks lost per chapter is a number. The tag is a label. Neither is a verdict on you, and both point at something you can do on Monday. The students who improve fastest are usually the ones whose logs are the most boring to read.
Around ninety minutes for a three-hour paper, done the same day. Ten minutes to score and mark unsure questions, thirty to reattempt wrong ones cold, thirty to log the errors against solutions, and twenty to convert the log into next week’s practice. An analysis finished in fifteen minutes is answer-checking.
Enough that the format holds no surprises and each one still gets a full analysis — for most students that means one full-length mock a week, rising in the final two months. Taking three mocks a week and analysing none of them is the most common way to plateau, because the errors never get named or fixed.
Check the tag split in your error log. If most lost marks are silly errors, more theory will not help and accuracy work will. If most are concept gaps, you need fewer mocks and more chapter practice. If they are time pressure, your order of attempt is the problem, not your knowledge.
Yes, the ones you were unsure about. A guess that lands scores +4 today and becomes a lost mark the next time the same idea appears. Mark them during the paper, review them with the wrong answers, and treat any right answer you cannot reproduce cold as a concept gap.
The method is identical; the arithmetic differs. NEET UG has 180 questions in 180 minutes with +4/−1, so time pressure errors concentrate in the subject you attempt last, and Biology carries 90 of the 180 questions. JEE Main gives 3 hours for 75 questions, so single hard questions eat the clock instead.
That is a concept gap, and it is useful information rather than a failure. Go back to the concept in your book or ask for a worked explanation, then do easier questions from that chapter before returning to the mock question a week later, cold. If it is still unsolvable, the chapter needs teaching, not practice.
Paper patterns quoted here are the ones NTA has used since 2025: JEE Main 75 questions in 3 hours and NEET UG 180 questions in 180 minutes, both marked +4 / −1.
The free diagnostic does the same job in twenty minutes: every wrong answer tagged, every chapter ranked by the marks it cost you.