Course Content
Section 1: Introduction & Exam Overview
This section gives you a complete introduction to the Indian Defence entrance exams—NDA, CDS, and AFCAT. You will learn about the Indian Armed Forces structure, eligibility criteria, exam pattern, selection process, and cut-off trends. It also provides an overview of the SSB Interview process to help you understand the entire journey from written exam to final selection.
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Lesson 1.1: Introduction to Indian Defence Services (Army, Navy, Air Force)
Lesson 1.2: Overview of NDA, CDS & AFCAT Exams
Lesson 1.3: Eligibility Criteria & Age Limits
Lesson 1.4: Exam Pattern and Selection Process
Lesson 1.5: Marking Scheme & Cut-off Trends
Lesson 1.6: Understanding SSB Interview Process
Section 2: General English Preparation
This section focuses on building a strong foundation in English language skills, which play a crucial role in NDA, CDS, and AFCAT exams. It covers important topics such as grammar rules, vocabulary, comprehension, error detection, synonyms & antonyms, sentence improvement, and idioms & phrases. With detailed lessons and practice, this section will help you improve accuracy, speed, and confidence in solving English questions effectively.
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Lesson 2.1: Vocabulary Building (Synonyms, Antonyms, One-word Substitution)
Lesson 2.2: Spotting Errors & Sentence Correction
Lesson 2.3: Idioms & Phrases
Lesson 2.4: Reading Comprehension Strategies
Lesson 2.5: Cloze Test & Fill in the Blanks
Lesson 2.6: Para Jumbles & Rearrangement of Sentences
Lesson 2.7: Practice Questions with Explanations
Section 3: General Knowledge & Current Affairs
This section equips aspirants for NDA, CDS, and AFCAT exams by covering important topics in History, Geography, Polity, Economy, Science & Technology, and Current Affairs. It focuses on building awareness of national and international events, government schemes, defense updates, and general knowledge essentials needed to score high in exams.
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Lesson 3.1: Indian History (Ancient, Medieval, Modern)
Lesson 3.2: Indian Polity & Constitution
Lesson 3.3: Indian Geography (Physical, Political, Economic)
Lesson 3.4: Economy & Budget Basics
Lesson 3.5: Science & Technology
Lesson 3.6: Defence-related Updates & Space Missions
Lesson 3.7: Current Affairs (National & International)
Lesson 3.8: Important Awards, Books, Sports & Personalities
Section 4: Mathematics for NDA & CDS
This section covers all essential mathematical concepts required for NDA, CDS, and AFCAT exams. It focuses on algebra, geometry, trigonometry, statistics, mensuration, and arithmetic, enabling aspirants to solve problems accurately and quickly. The lessons provide step-by-step explanations, formulas, and practice tips to build confidence and improve problem-solving speed.
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Lesson 4.1: Algebra (Equations, Inequalities, Polynomials)
Lesson 4.2: Trigonometry (Heights, Distances, Identities)
Lesson 4.3: Geometry (Lines, Circles, Triangles, Mensuration)
Lesson 4.4: Arithmetic (Percentages, Profit & Loss, Ratio, Time & Work)
Lesson 4.5: Probability & Statistics
Lesson 4.6: Coordinate Geometry
Lesson 4.7: Matrices & Determinants
Lesson 4.8: Calculus Basics (Limits, Differentiation, Integration)
Lesson 4.9: Shortcut Tricks & Practice Sets
Section 5: Reasoning & Military Aptitude (For AFCAT & CDS)
This section is designed to enhance logical reasoning, analytical skills, and spatial aptitude, which are crucial for AFCAT, CDS, and other defence exams. It covers verbal reasoning, non-verbal reasoning, puzzles, coding-decoding, series, and military aptitude tests. Aspirants will learn problem-solving strategies, shortcuts, and practice methods to tackle reasoning questions efficiently.
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Lesson 5.1: Verbal Reasoning (Analogy, Classification, Coding-Decoding)
Lesson 5.2: Non-Verbal Reasoning (Figure Series, Puzzles)
Lesson 5.3: Spatial Ability & Embedded Figures
Lesson 5.4: Data Interpretation & Logical Deductions
Lesson 5.5: Military Aptitude & Decision-Making Tests
Lesson 5.6: Practice Question Sets
Section 6: General Science (NDA & CDS Specific)
This section covers the core concepts of Physics, Chemistry, and Biology relevant for NDA and CDS exams. Aspirants will learn fundamental scientific principles, real-world applications, and defence-related examples to solve multiple-choice questions efficiently. The focus is on concept clarity, quick understanding, and solving numerical or theory-based questions accurately.
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Lesson 6.1: Physics (Mechanics, Heat, Light, Sound, Electricity, Modern Physics)
Lesson 6.2: Chemistry (Basic Concepts, Atomic Structure, Reactions, Everyday Chemistry)
Lesson 6.3: Biology (Human Physiology, Plants, Diseases, Nutrition, Biotechnology)
Lesson 6.4: Environment & Ecology
Lesson 6.5: Defence Technology Applications in Science
Section 7: Exam-specific Strategy
This section provides targeted strategies for NDA, CDS, and AFCAT exams, helping aspirants maximize scores, manage time efficiently, and tackle each section with confidence. It covers subject-wise preparation tips, exam pattern insights, time management techniques, and last-minute revision strategies. Aspirants will learn how to plan their studies strategically, attempt questions smartly, and improve overall performance.
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Lesson 7.1: NDA Written Exam Strategy
Lesson 7.2: CDS Written Exam Strategy
Lesson 7.3: AFCAT Written Exam Strategy
Lesson 7.4: Time Management & Accuracy Tips
Lesson 7.5: Mock Tests & Previous Year Paper Analysis
Section 8: SSB Interview Preparation (5-Day Process)
This section provides a comprehensive guide for SSB (Services Selection Board) interview preparation, covering the 5-day selection process for NDA, CDS, and AFCAT aspirants. It includes psychological tests, group tasks, personal interviews, and officer-like qualities assessment. Aspirants will learn how to perform confidently, demonstrate leadership, and handle stress while showcasing their personality, communication, and decision-making skills effectively.
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Lesson 8.1: Introduction to SSB Interview
Lesson 8.2: Screening Test (OIR & PPDT)
Lesson 8.3: Psychological Tests (TAT, WAT, SRT, SDT)
Lesson 8.4: GTO Tasks (Group Discussion, Lecturette, Outdoor Tasks)
Lesson 8.5: Personal Interview Techniques
Lesson 8.6: Conference & Result Declaration
Lesson 8.7: Do’s and Don’ts for SSB
Section 9: Physical Fitness & Medical Standards
This section covers the physical and medical requirements necessary for NDA, CDS, and AFCAT aspirants. It highlights fitness benchmarks, medical tests, and physical training guidelines required to qualify for defence services. Aspirants will learn about height, weight, vision standards, endurance tests, and common disqualifying conditions, along with tips to improve overall fitness and meet medical norms.
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Lesson 9.1: Defence Physical Standards for NDA/CDS/AFCAT
Lesson 9.2: Physical Fitness Exercises & Routines
Lesson 9.3: Diet & Nutrition Tips for Aspirants
Lesson 9.4: Medical Tests & Common Rejections
Lesson 9.5: Eye, Height, Weight & BMI Criteria
Lesson 9.6: Mental Fitness & Stress Management
Section 10: Study Resources & Practice
This section provides essential study materials, reference books, online resources, and practice strategies for NDA, CDS, and AFCAT aspirants. It helps candidates strengthen concepts, solve practice questions, and analyze previous year papers to maximize exam readiness and confidence.
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Lesson 10.1: Best Reference Books & Materials
Lesson 10.2: Online Resources & Official Notifications
Lesson 10.3: Practice Question Sets for NDA/CDS/AFCAT
Lesson 10.4: Mock Test Series (Full-Length)
Lesson 10.5: Last-Minute Preparation & Revision Strategy
Section 11: Career Path After Selection
This section provides an overview of the career opportunities, training, promotions, and professional growth for candidates after selection in NDA, CDS, and AFCAT. Aspirants will learn about commissioning courses, branch-specific roles, service tenure, and advancement prospects, helping them plan their long-term defence career strategically.
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Lesson 11.1: Training at NDA, IMA, OTA & AFA
Lesson 11.2: Life in the Armed Forces (Army, Navy, Air Force)
Lesson 11.3: Career Growth & Opportunities
Lesson 11.4: Pay Scale, Perks & Benefits
Lesson 11.5: Motivational Success Stories
Defence Exam Prep: NDA, CDS & AFCAT Complete Guide

Lesson 4.4: Arithmetic (Percentages, Profit & Loss, Ratio, Time & Work)

Arithmetic is an essential part of the Mathematics section for NDA, CDS, and AFCAT exams. It tests aspirants on numerical problem-solving, basic calculations, and logical reasoning.

1. Percentages

  • Basics: Percent (%) = (Part/Whole) × 100

  • Problems: Increase/decrease, discount, interest calculations

  • Example:

    • If 20% of 500 = ? → (20/100) × 500 = 100

2. Profit & Loss

  • Formulas:

    • Profit = Selling Price (SP) – Cost Price (CP)

    • Loss = Cost Price (CP) – Selling Price (SP)

    • Profit% = (Profit/CP) × 100

    • Loss% = (Loss/CP) × 100

  • Example:

    • CP = 400, SP = 500 → Profit = 100, Profit% = 25%

3. Ratio & Proportion

  • Basics: Ratio = a:b, Proportion = a:b = c:d

  • Problems: Sharing, mixing, ingredients, age-related problems

  • Example:

    • Ratio of boys to girls in class = 3:2 → For 50 students, boys = (3/5)×50 = 30, girls = 20

4. Time & Work

  • Concepts: Work done = Rate × Time

  • Problems: Work done by individuals or in groups, efficiency problems

  • Example:

    • A can complete a task in 10 days, B in 15 days. Work done together in 1 day = 1/10 + 1/15 = 1/6 → They complete work in 6 days

Exam Tips

  • Memorize basic formulas for percentages, profit-loss, ratio, and time & work.

  • Practice daily 15–20 arithmetic problems to improve speed.

  • Solve previous year NDA, CDS, AFCAT arithmetic questions.

  • Focus on accuracy first, then speed.

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