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Free Notes • CBSE Class 10 • 2026–27

ARMS ACADEMY Class 10 Notes

“Read it once. Remember it for the boards.”

Short, exam-focused notes for Maths, Science and Social Science: key formulas, reactions, timelines, diagrams and practice questions. Join our Telegram channel to download them free.

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A Look Inside ARMS Class 10 Notes

Written like a topper's notebook: the idea, the key result in a box, a worked example and questions to try. Here are sample pages from each subject. The complete notes are on our Telegram channel.

📐
MathematicsFormulas · theorems · solved examples
Triangles · Theorem

Basic Proportionality Theorem

ABCDE

A line drawn parallel to one side of a triangle divides the other two sides in the same ratio.

AD / DB = AE / EC
e.g. AD = 1.5, DB = 3, AE = 1 ⇒ EC = 2 cm ✓
Write "by BPT" in the exam. It carries a mark!
More chapters + practice questions
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🧪
ScienceReactions · diagrams · numericals
Chemical Reactions

Types of reactions

  • CombinationCaO + H₂O → Ca(OH)₂
  • Decomposition2FeSO₄ heat→ Fe₂O₃ + SO₂ + SO₃
  • DisplacementFe + CuSO₄ → FeSO₄ + Cu
  • Double displacementNa₂SO₄ + BaCl₂ → BaSO₄↓ + 2NaCl
Fe pushes out Cu, so the blue solution turns pale green!
Physics, Chemistry & Biology chapters
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🌏
Social ScienceTimelines · maps · key terms
History · Nationalism in India

Timeline to remember

  1. 1915Gandhiji returns from South Africa
  2. 1917Champaran Satyagraha (indigo farmers)
  3. 1919Rowlatt Act; Jallianwala Bagh, 13 April
  4. 1920Non-Cooperation Movement adopted
  5. 1922Chauri Chaura; movement withdrawn
  6. 1930Dandi March; Civil Disobedience begins
Learn each date as cause → movement.
History, Geography, Civics & Economics
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In the Channel

What You Get When You Join

One channel, kept tidy. Notes are posted chapter by chapter, so you can revise without scrolling through chat.

Chapter-wise Notes

Concise PDF notes for Maths, Science and Social Science, posted subject by subject.

Formula & Fact Boxes

Formulas, reactions, dates and definitions in one box, ready for last-minute revision.

Solved Examples

Step-by-step answers and numericals written the way CBSE examiners award marks.

Practice Questions

Questions at the end of each chapter so you can test yourself.

How to Join

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  3. Download your subject's notesOpen the channel and download the Maths, Science or SST notes. New notes show up there as they are posted.
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Free notes from ARMS Academy, teaching students in Pune, Daund and Dhule since 2012.

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