Preparing for the Combined Defence Services (CDS) and National Defence Academy (NDA) examinations requires dedication, discipline, and a well-structured study plan. Many aspirants struggle because they lack a clear roadmap. The good news is that 90 days of focused preparation can significantly improve your chances of success.
At The Lakshya Academy, we believe that smart preparation is just as important as hard work. This comprehensive 90-day strategy is designed to help NDA and CDS aspirants maximize their performance and approach the examination with confidence.
Understanding the CDS and NDA Exams
Before creating a study plan, it is important to understand the exam pattern.
NDA Examination
The NDA written examination consists of:
- Mathematics
- General Ability Test (GAT)
- English
- General Knowledge
CDS Examination
The CDS examination includes:
- English
- General Knowledge
- Elementary Mathematics (for IMA, INA, and AFA candidates)
After clearing the written examination, candidates must appear for the Services Selection Board (SSB) Interview, which evaluates personality, leadership qualities, and officer-like attributes.
90-Day CDS/NDA Preparation Plan
The preparation journey can be divided into three phases:
Phase 1: Foundation Building (Days 1–30)
The first month focuses on understanding concepts and strengthening basics.
Mathematics Preparation
Topics to cover:
- Algebra
- Trigonometry
- Geometry
- Mensuration
- Statistics
- Probability
- Arithmetic
Daily Schedule:
- 2 hours of concept learning
- 1 hour of practice questions
English Preparation
Focus on:
- Grammar rules
- Vocabulary building
- Reading comprehension
- Sentence improvement
- Error spotting
Daily Activities:
- Read newspapers for 30 minutes
- Learn 15–20 new words
- Solve grammar exercises
- General Knowledge Preparation
Cover:
- Indian History
- Geography
- Polity
- Economics
- Science
- Defence-related current affairs
Daily Target:
- 1–2 subjects per day
- Make concise notes for revision
Weekly Goal
- Complete one mock test every weekend
- Analyze mistakes thoroughly
Phase 2: Intensive Practice (Days 31–60)
This phase focuses on speed, accuracy, and application of concepts.
Mathematics Strategy
- Solve previous years’ papers
- Practice time-bound question sets
- Focus on weak areas
Daily Target:
- 100–150 questions
- Timed practice sessions
English Strategy
Practice:
- Comprehension passages
- Cloze tests
- Synonyms and antonyms
- Para-jumbles
Daily Target:
- 2 reading passages
- 50 objective questions
General Knowledge Strategy
Focus on:
- Current affairs of the last 6–12 months
- Defence exercises
- National and international events
- Government schemes
Daily Target:
- Revise static GK
- Update current affairs notes
Phase 3: Exam Simulation and Revision (Days 61–90)
- The final month is crucial for maximizing performance.
Mock Test Strategy
Take:
- 2–3 full-length mock tests every week
- Subject-wise sectional tests
After Every Mock:
- Identify errors
- Track weak topics
- Improve time management
- Revision Plan
Week 1
Mathematics revision
- Formula notebook review
Week 2
English revision
- Vocabulary and grammar practice
Week 3
General Knowledge revision
- Current affairs recap
Week 4
Full syllabus revision
- Mock test analysis
Daily Study Schedule for NDA/CDS Aspirants
Time Activity
6:00 AM – 7:00 AM Physical Fitness Training
8:00 AM – 10:00 AM Mathematics
10:30 AM – 12:00 PM English
1:00 PM – 2:30 PM General Knowledge
3:00 PM – 4:00 PM Current Affairs
5:00 PM – 6:00 PM Practice Questions
8:00 PM – 9:00 PM Revision
Importance of Physical Fitness During Preparation
Success in defence examinations is not limited to academics. Physical fitness plays a vital role in your overall preparation.
Include:
- Running
- Push-ups
- Sit-ups
- Planks
- Endurance training
A healthy body supports better concentration and confidence during the selection process.
SSB Interview Preparation Alongside Written Exam
Many candidates make the mistake of waiting until after the written exam to begin SSB preparation.
Start early by:
- Improving communication skills
- Reading newspapers daily
- Participating in group discussions
- Developing leadership qualities
- Practicing psychological tests
This integrated approach saves valuable time after the written examination.
Common Mistakes to Avoid During CDS/NDA Preparation
1. Ignoring Previous Year Papers
- Previous papers reveal exam patterns and frequently asked topics.
2. Over-Reliance on Multiple Books
- Stick to limited and reliable study materials.
3. Lack of Revision
- Without revision, retention decreases significantly.
4. Neglecting Current Affairs
- Current events form a crucial part of the General Knowledge section.
5. Skipping Mock Tests
- Mocks improve speed, confidence, and exam temperament.
Why Choose The Lakshya Academy for CDS/NDA Preparation?
The Lakshya Academy offers a structured approach to defence exam preparation through:
- Experienced faculty
- Comprehensive study material
- Regular mock tests
- SSB interview guidance
- Physical fitness support
- Personalized mentoring
Our goal is to help every aspirant develop the knowledge, confidence, and leadership qualities required to serve the nation.
Conclusion
Cracking the CDS or NDA examination in 90 days is achievable with the right strategy, consistency, and determination. A balanced approach involving concept building, rigorous practice, regular revision, mock tests, and SSB preparation can significantly improve your chances of selection.
Stay disciplined, follow a structured study plan, and remain focused on your goal. With expert guidance from The Lakshya Academy, your dream of joining the Indian Armed Forces can become a reality.

