Preparing for the National Defence Academy (NDA) exam in just three months may seem challenging, but with the right planning and consistent effort, it is completely achievable. Every year, thousands of students clear the NDA written examination by following a structured study plan instead of studying randomly. If you are serious about joining the Indian Army, Navy, or Air Force, the next 90 days can become the turning point of your career.

The NDA examination conducted by the Union Public Service Commission (UPSC) tests candidates in two papers—Mathematics (300 Marks) and General Ability Test (600 Marks). Success depends not only on hard work but also on smart preparation, regular revision, and consistent mock test practice.

NDA Mathematics Syllabus 2027

This 90-Day NDA Preparation Strategy is designed for beginners as well as repeat aspirants. By following this plan, you can complete the syllabus on time, improve your speed and accuracy, and build the confidence needed to perform well in the exam.

Why is a 90-Day NDA Preparation Strategy Effective?

A well-planned 90-day schedule allows you to divide your preparation into manageable phases. Instead of trying to cover everything at once, you focus on concept building, practice, revision, and mock tests step by step.

The strategy is divided into three phases:

• Days 1–30: Build strong concepts.
• Days 31–60: Practice questions and strengthen weak areas.
• Days 61–90: Revise, solve previous year papers, and attempt full-length mock tests.

This approach helps reduce exam stress and improves retention.

Know the NDA Exam Pattern

Before starting your preparation, understand the exam pattern.

Paper	Marks	Duration
Mathematics	300	2.5 Hours
General Ability Test	600	2.5 Hours
Total	900	5 Hours

The GAT paper includes:

• English
• Physics
• Chemistry
• General Science
• History
• Geography
• Current Affairs

Since GAT carries 600 marks, equal attention should be given to both Mathematics and General Ability.

First 30 Days – Build Your Foundation

The first month should focus entirely on understanding concepts rather than memorizing answers.

Mathematics

Study:

• Algebra
• Trigonometry
• Matrices
• Determinants
• Coordinate Geometry

Solve at least 30–40 Maths questions daily.

English

Practice:

• Grammar
• Vocabulary
• Reading Comprehension
• Synonyms & Antonyms
• Error Detection

Spend 30 minutes every day reading an English newspaper or editorial.

General Ability Test

Cover:

• Physics basics
• Chemistry fundamentals
• General Science
• History (Ancient & Medieval)
• Geography basics

Read current affairs daily for 20–30 minutes.

Second 30 Days – Practice & Improve

After completing the basic syllabus, start solving questions.

Daily Goals

• 50 Mathematics MCQs
• 30 English Questions
• 40 GAT Questions
• One previous year paper every week

Start identifying your weak topics and revise them immediately.

Final 30 Days – Revision & Mock Tests

The last month is all about revision and exam simulation.

During this phase:

• Attempt 2–3 Full-Length Mock Tests every week
• Revise important formulas daily.
• Solve previous year NDA papers.
• Improve speed and accuracy.
• Avoid starting new topics unless absolutely necessary.

Remember, revision is more important than learning something new at this stage.

NDA GAT Syllabus 2027

Daily Study Timetable

A disciplined daily routine can make a huge difference.

Time	Activity
6:00–7:00 AM	Current Affairs + Newspaper
7:00–9:00 AM	Mathematics Practice
10:00–11:30 AM	Physics/Chemistry
12:00–1:00 PM	English
3:00–5:00 PM	History/Geography
6:00–7:00 PM	MCQ Practice
8:00–9:00 PM	Revision

Study consistently rather than studying for very long hours on a single day.

Subject-wise Preparation Tips

Mathematics

• Learn formulas by heart.
• Practice numerical questions daily.
• Solve PYQs regularly.

English

• Improve vocabulary.
• Read newspapers.
• Solve grammar exercises.

GAT

• Study NCERT books.
• Revise important facts.
• Practice topic-wise MCQs.

Current Affairs

Focus on:

• Defence News
• Government Schemes
• Sports
• Awards
• Science & Technology

Common Mistakes to Avoid

Many students lose marks because of simple mistakes.

Avoid:

• Ignoring Mathematics
• Skipping mock tests
• Not revising formulas
• Studying without a timetable
• Ignoring English
• Reading too many books instead of revising one source properly

Start Your NDA Journey with Convex Classes

If you want expert guidance, Convex Classes offers complete online coaching for NDA aspirants.

You get:

• Live Online Classes
• Complete Maths & GAT Notes
• Previous Year Questions
• Weekly Mock Tests
• Recorded Lectures
• One-to-One Doubt Support
• Performance Analysis
• Expert Mentorship

Instead of preparing alone, learn with experienced faculty and stay on track throughout your NDA journey.

Frequently Asked Questions (FAQs)

Is 90 days enough to prepare for NDA?

Yes. With a disciplined study plan, regular revision, and mock tests, 90 days are sufficient for many aspirants.

How many hours should I study daily?

Aim for 6–8 hours of focused study with short breaks and daily revision.

Which subject is the most important in NDA?

Both Mathematics and GAT are important. However, GAT carries 600 marks, so balanced preparation is essential.

Are mock tests necessary?

Yes. Mock tests improve speed, accuracy, and time management while helping you identify weak areas.