How to prepare for NDA 2021 (2) Mathematics
The Mathematics section of NDA will carry 120 objective type multiple-choice questions. Total marks allotted to this section are 300. Candidates will get two hours 30 minutes to solve the question paper. For the correct answer, candidates will score 2.5 marks while 0.83 marks will be deducted for wrong answers.
Syllabus and
important topics for Mathematics
NDA syllabus comprises topics from Algebra,
Matrices and Determinants, Trigonometry, Analytical Geometry of two and three
dimensions, Differential Calculus, Integral Calculus and Differential
Equations, Vector Algebra and Statistics and Probability. The topic-wise
distribution of questions in Mathematics are given below:
| 
   Subjects  | 
  
   Number of Question  | 
 
| 
   Algebra  | 
  
   30  | 
 
| 
   Trigonometry  | 
  
   20  | 
 
| 
   Determinants
  and matrices  | 
  
   10  | 
 
| 
   Analytical
  Geometry  | 
  
   20  | 
 
| 
   Vector
  Algebra  | 
  
   10  | 
 
| 
   Statistics
  and Probability  | 
  
   10  | 
 
| 
   Differential
  calculus and Integral calculus  | 
  
   20  | 
 
| 
   Total  | 
  
   120  | 
 
Follow the tips and tricks below for the
Mathematics section:
·        
Candidates must have a clear understanding of the NDA syllabus and
mark the important topics after analyzing the previous years’ question papers.
·        
Start preparing the important topics first, at the same time,
delegate time for the difficult topics.
·        
Solve mock tests to decide how much time to dedicate to each type
of question. Also, candidates must solve previous year question papers to get
an idea about the type of questions asked in the exam.
·        
Candidates must learn tips, tricks and shortcuts for efficient
time management.
·        
Memorise simple calculations such as squares and cubes.
·        
Make notes of shortcuts and formula to refer to during last-minute
revision.
·        
As there is negative marking in the exam, they should mark the
answer only if they are sure about it. Do not guess the answers during the
exam.
·        
Candidates must refer to good Mathematics books and Coaching
classes for NDA preprations. 
·        
During the final phase of preparation, devote at least three hours
for going through the formula.
·        
Do not get confused while converting the numbers from decimal to a
binary system.
·        
Trigonometry can be tricky. So be clear with the concepts such as
Properties of Triangles and Inverse Trigonometric functions. Hence, solve such
questions at the end.
·        
Vector Algebra is the most important unit in the syllabus.
Practice questions from Vector Product or Cross Product of two vectors.
·        
The statistics part can be easy to crack but be careful while
taking the figures.
·        
In Probability, the Elementary Theorems, Bayes' Theorem and
Binomial Distribution are important.
Best books
for Mathematics
It is important that candidates must choose a
good book for the Mathematics section of NDA.
·        
NCERT Class 11 and 12 books
·        
Mathematics for NDA and NA:
National Defense Academy and Naval Academy by R S Aggarwal
·        
Quantitative Aptitude for
Competitive exam by RS Aggarwal
·        
NDA and NA examination: Previous
solved papers by R Gupta
·        
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