We mark your answer the way the board marks it.
Photograph the page you wrote on. We compare it against the CBSE marking scheme, step by step, and tell you which step lost the mark.
Two parts, 30 to 45 minutes each, on paper. Complete them in two sessions if you like. Free through the 2027 boards.
Show that n² − 1 is divisible by 8 when n is odd.
1/3marks
Photographed on a phone, on ruled paper, working shown as written.
- +1mState the claim for a general odd n
- 0/1Write n = 2k + 1 and expand n² − 1 = 4k(k + 1)
- 0/1Argue k(k + 1) is even, so 8 divides n² − 1
This answer checks n = 3 only. A proof has to hold for every odd n. 2 marks are recoverable.
Every question on this page is quoted from a board paper with its year, set, and number. You can check any of them against the original.
Two parts give the AI enough evidence to recommend what to practise next.
Find the value of: 2√2 cos 45° sin 30° + 2√3 cos 30°.
A list of what to fix, in the order it is worth fixing.
- Heights & Distances41/100
Two-triangle setups keep collapsing into one. Worth a full 5-marker.
- Trigonometric Identities58/100
Proofs start from the answer instead of one side. Marks leak in the middle steps.
- Trigonometric Ratios86/100
Solid. Standard angle values are automatic now.
Each step carries its own mark, so you can see where the answer broke.
If sin θ + cos θ = √3, find the value of sin θ cos θ.
- Squared both sides and used sin²θ + cos²θ = 1.+1m
- Stopped at 2 sin θ cos θ = 2. The asked value, sin θ cos θ = 1, was never stated.0/1m
Next drill: finishing the last line of an evaluation. 3 questions queued.
Ask a follow-up and get the working set out the way an examiner expects it.
I always mess up the two-triangle tower questions. How do I set them up?
Set up both triangles before touching any numbers. For any two-position problem:
- One height h, two horizontal distances: x and x + d.+1m
- Write both ratios first: tan of each angle equals h over its own distance.+1m
- Then eliminate x. The setup earns marks before you solve anything.+1m
A full 80-mark paper, built to the same blueprint as the real one.
- Section A20 questions · 1 mark · MCQ
- Section B5 questions · 2 marks
- Section C6 questions · 3 marks
- Section D4 questions · 5 marks
- Section E3 case studies · 4 marks
Taken from the 2024 board paper, section for section. Marked in minutes, with every lost mark tied to a subtopic.
The mock follows the board blueprint, section for section.
Sections A through E, 38 questions, 80 marks. Every question pattern is taken from a paper the board has already set, and each sample below carries the year and number it came from.
- Sit it
- Timed, on paper, the full A to E structure.
- Upload
- Photograph everything in one batch.
- Get it back
- Marked in minutes, with each lost mark tied to a subtopic.
Section A · 20 questions · 1 mark · MCQ
CBSE 2025 · Set 1 · Q4If θ is an acute angle and 7 + 4 sin θ = 9, then the value of θ is:
[1 mark]Answers are marked the same way as the attempt at the top of this page: step by step, against the scheme.
What you practise first comes from eleven years of papers.
Each strip is one subtopic read across the 2016 to 2026 papers. A filled cell means the board asked it that year. Your own scores decide the rest of the order.
Shown here for Real Numbers. The same table exists for every chapter in the syllabus.
Source: our own tagging of the 2016 to 2026 CBSE Class 10 Maths papers. 2015 is excluded because no subtopic in this chapter appeared that year.
One WhatsApp message, every Sunday.
How much was practised, what is improving, and which marks are still at risk in the board exam. No separate app to install, and no score out of ten.
Sunday
- This week
- Practised 5 of 7 days, 14 questions.
- Improving
- Trigonometry identities, 58 to 72 out of 100.
- Needs attention
- Height and distance problems. Worth 5 marks in the board exam.
Questions.
A two-part diagnostic gives the AI enough evidence to recommend what to fix next.
··· days to the Class 10 Maths board exam