How many chapters are in CBSE Class 10 Maths?

Fourteen, from Real Numbers to Probability. CBSE groups them into seven units and publishes the marks by unit, not by chapter.

Which unit carries the most marks in Class 10 Maths?

Algebra, at 20 of the 80 theory marks — a quarter of the paper, spread across Polynomials, Pair of Linear Equations, Quadratic Equations and Arithmetic Progressions. Geometry is next at 15, then Trigonometry at 12. Number Systems and Coordinate Geometry are the lightest at 6 each.

Is there a practical in Class 10 Maths?

Yes. Five of the twenty internal marks are a lab practical — lab activity, project work and viva. Another ten come from the pen-paper test and multiple assessment together, and five from the portfolio. That split is different from Science, where the four internal bands are five marks each.

Has any Class 10 Maths content been dropped for 2026-27?

The curriculum document carries no note excluding any topic from the year-end examination, unlike Science and Social Science, which both do. Treat the whole book as examinable and confirm against the CBSE PDF linked at the foot of this page.

CBSE · Class 10 Mathematics

CBSE Class 10 Maths syllabus — 14 chapters, seven units, 80 marks

Class 10 Maths is fourteen chapters, but the board thinks in seven units and marks the paper that way. Algebra alone is a quarter of it. Below is the chapter list, the unit-wise weighting most syllabus pages leave out, and where the other twenty marks come from.

Chapters: 14
Units: 7
Paper: 80 marks
Heaviest unit: Algebra · 20

How the 100 marks divide

Class 10 Mathematics
Section	Marks	Share
Written theory paper three hours	80
Internal assessment school-assessed, including a lab practical	20
Total	100

The 80-mark paper, unit by unit

In CBSE order, with the chapters each unit draws on. Read it once before you plan revision — the book's chapter order is not the paper's order of importance.

Theory, by unit
Section	Marks	Share
Unit I — Number Systems Chapter 1	6
Unit II — Algebra Chapters 2, 3, 4, 5	20
Unit III — Coordinate Geometry Chapter 7	6
Unit IV — Geometry Chapters 6 and 10	15
Unit V — Trigonometry Chapters 8 and 9	12
Unit VI — Mensuration Chapters 11 and 12	10
Unit VII — Statistics and Probability Chapters 13 and 14	11
Total	80

CBSE lists topics under each unit rather than chapter numbers. The chapter ranges above are our mapping of those topic lists onto the NCERT chapter order.

Same seven units, heaviest first

The useful version. Four chapters carry twenty marks between them; two chapters carry six each.

Algebra · Chapters 2, 3, 4, 5 20
Geometry · Chapters 6 and 10 15
Trigonometry · Chapters 8 and 9 12
Statistics and Probability · Chapters 13 and 14 11
Mensuration · Chapters 11 and 12 10
Number Systems · Chapter 1 6
Coordinate Geometry · Chapter 7 6

Where the other 20 marks come from

Worth reading even if you skip the rest: the Maths internal split is not the same as the Science one.

Internal assessment
Section	Marks	Share
Pen-paper test and multiple assessment 5 + 5	10
Portfolio	5
Lab practical lab activity, project work, viva	5
Total	20

Every chapter, in book order

Mathematics

14 chapters

NCERT Mathematics

80-mark paper. Algebra is the heaviest unit at 20 marks, then Geometry at 15 and Trigonometry at 12.

1 Real Numbers
2 Polynomials
3 Pair of Linear Equations in Two Variables
4 Quadratic Equations
5 Arithmetic Progressions
6 Triangles
7 Coordinate Geometry
8 Introduction to Trigonometry
9 Some Applications of Trigonometry
10 Circles
11 Areas Related to Circles
12 Surface Areas and Volumes
13 Statistics
14 Probability

Class 10 Maths syllabus — common questions

How many chapters are in CBSE Class 10 Maths?: Fourteen, from Real Numbers to Probability. CBSE groups them into seven units and publishes the marks by unit, not by chapter.
Which unit carries the most marks in Class 10 Maths?: Algebra, at 20 of the 80 theory marks — a quarter of the paper, spread across Polynomials, Pair of Linear Equations, Quadratic Equations and Arithmetic Progressions. Geometry is next at 15, then Trigonometry at 12. Number Systems and Coordinate Geometry are the lightest at 6 each.
Is there a practical in Class 10 Maths?: Yes. Five of the twenty internal marks are a lab practical — lab activity, project work and viva. Another ten come from the pen-paper test and multiple assessment together, and five from the portfolio. That split is different from Science, where the four internal bands are five marks each.
Has any Class 10 Maths content been dropped for 2026-27?: The curriculum document carries no note excluding any topic from the year-end examination, unlike Science and Social Science, which both do. Treat the whole book as examinable and confirm against the CBSE PDF linked at the foot of this page.