MyAiSchool Previous-year papers tell you what you got wrong. They do not tell you which chapter to open tonight. A chapter-tagged diagnostic does: twenty questions across the heaviest chapters, fifteen minutes, and a colour-coded map showing which chapters are leaking marks. Fix the three reddest, retake it in a fortnight, and compare.
Last updated: 13 September 2026
Why does revision so often go into the wrong chapter?
Because the two things a student uses to choose β how a chapter feels, and what they got wrong last time β are both poor guides.
A chapter feels hard when it is unfamiliar. It leaks marks when it is half-known: the method is there, the sign convention or the final step is not. Those are different chapters, and the second one is where the marks are.
Marked papers have the opposite problem. A cross tells you the answer was wrong. It rarely tells you whether that was a concept gap, a formula you never memorised, or a calculation slip under time pressure β and the fix for each is different.
What a chapter-tagged diagnostic actually does
| Step | What happens | Time |
|---|---|---|
| 1 | Pick your class, board and subject | 30 seconds |
| 2 | Answer 20 questions, each tagged to a specific chapter | ~15 minutes |
| 3 | Get a chapter-by-chapter map β green, amber, red | Instant |
| 4 | Work the three reddest chapters for a fortnight | 2 weeks |
| 5 | Retake it and compare the two maps | 15 minutes |
Step 5 is the one people skip, and it is the only one that proves anything. A single test is a snapshot; two tests a fortnight apart are evidence.
What it will not do. Twenty questions cannot predict your board mark, and any tool that claims to is selling something. What a short diagnostic gives you is a ranking β which chapters to open first. That is a smaller claim, and a more useful one.
What do you do with a red chapter?
Not re-read it. Reading produces recognition, and the exam asks for production. Twenty-five minutes per chapter, structured:
| Minutes | What you do | Why |
|---|---|---|
| 8 | Write everything you remember on a blank page | Forces recall, which is what the paper tests |
| 10 | Correct that page against the book in another colour | Shows precisely what was missing |
| 7 | Answer ten questions on the chapter | Converts recognition into production |
Score below seven out of ten and the chapter goes back on tomorrow’s list, however long you spent on it today.
Which chapters are worth the diagnostic in the first place?
The heavy ones. There is no point diagnosing a chapter worth four marks before one worth twenty. For Class 10 Maths the official CBSE split puts Algebra at 20 marks and Geometry at 15 β 35 of 80 from six chapters. The full table is in our Class 10 Maths chapter weightage breakdown.
Start there, then rank by weightage against your own confidence:
| Chapter is⦠| What to do |
|---|---|
| Heavy and weak | Start here, always β this is where the marks are sitting |
| Heavy and strong | One recall pass to protect what you already have |
| Light and weak | Only if time remains |
| Light and strong | Leave it alone |
Find your three reddest chapters tonight. The Score Map is twenty chapter-tagged questions in fifteen minutes, and it hands back the map plus the three chapters to fix first. Free, 50 AI credits included, no card needed.
Class 10 in 2027: two attempts changes the calculation
From 2027 the Class 10 board exam runs twice β the February attempt is compulsory, the May one optional for up to three subjects, and the better score counts. That makes an accurate weak-chapter list more valuable, not less: the second attempt only helps if you know precisely which three subjects to put into it.
The rules, and who should actually take the second exam, are in our complete guide to the two board exams.
Where does an AI tutor fit?
After the diagnosis, not before it. A tutor pointed at a chapter you already know changes nothing; the same tutor pointed at a red chapter, with the check-questions actually answered, is the fastest route to turning it green.
We wrote an honest assessment of what that does and does not achieve in does an AI tutor actually improve marks? β including where coaching still wins.
A worked example
A Class 10 student is convinced Trigonometry is their weakest chapter, because it feels hardest. The diagnostic disagrees: Trigonometry comes back amber, while Quadratic Equations and Triangles come back red β both in the two heaviest units.
The reason is ordinary. They practise Trigonometry often because it worries them, and avoid Triangles because proofs are tedious. Two weeks on the two red chapters, then a retake, and the map moves. Three weeks spent on Trigonometry would have moved almost nothing.
Frequently asked questions
How long does the diagnostic take?
About fifteen minutes for twenty questions. Doing it slowly does not make the result more accurate.
Can twenty questions really identify weak chapters?
It identifies a ranking, not a score. Four questions across five chapters is enough to separate a chapter you can do from one you cannot β it is not enough to predict a board mark, and it does not claim to.
How often should I retake it?
Every two weeks while you are actively revising. More often than that and you are measuring noise rather than progress.
Does it cover my board?
Class 1β12 across CBSE, ICSE and State boards, plus JEE, NEET, CUET and Olympiad tracks.
Is it really free?
Yes. The Score Map and 50 AI credits need no card. Paid plans are βΉ1,499 a year (Basic) and βΉ2,499 a year (AI Plus); upgrading from Basic costs only the difference.
What if the map says everything is red?
Then ignore the colour and use the order. Take the two heaviest chapters, finish them properly, and retake. Two chapters finished beats five chapters touched.
Stop revising in book order. Fifteen minutes, twenty questions, and a chapter-by-chapter map of where your marks are going β free, no card needed.