UPSC CDS Exam Syllabus 2021 | Download CDS OTA, IMA, INA, AFA syllabus pdf

The combined defense services examination is conducted for admission in the Indian Military Academy (IMA), Air Force Academy (AFA), Indian Naval Academy (INA), and Officers’ Training Academy (OTA).

UPSC CDS Exam is conducted twice a year. The recruitment process of the UPSC CDS Exam is not that easy and proper and dedicated preparation is required to crack UPSC CDS Exam 2021.

Candidates should have a proper idea about UPSC CDS Exam Syllabus 2021 exam to start the preparation in the right direction.

All candidates can check the latest syllabus on this page and make their preparation strategy accordingly.

UPSC CDS Exam Syllabus 2021 for IMA, AFA, and INA

Syllabus for Indian Military Academy (IMA), Air Force Academy (AFA) and Indian Naval Academy is same. It will consist of three parts i.e. English, General Knowledge, and Elementary Mathematics.

OTA Syllabus

CDS OTA Syllabus is different from IMA, AFA, and INA. CDS OTS Syllabus will consist of only English and General Knowledge. The Elementary Mathematics part is not there in the Syllabus

Please have a look all parts syllabus below:

There will be three parts in the Syllabus 2021.

  • English
  • General Knowledge
  • Elementary Mathematics

Syllabus of Elementary Mathematics will be similar to the matriculation level Mathematics exam. Syllabus for all other subjects will be similar to any Indian University Graduation level exam.

Please find below UPSC CDS Exam Syllabus 2021:


The question paper will be designed to test the candidates’ understanding of English and workmanlike use of words.


General questions on the History and Geography subjects which do not require any special kind of preparation. Questions based on current events and general awareness of the candidates. General knowledge questions are just to check the candidate’s observation power and common understanding and how he develops his technical knowledge based on the current news and events.



Number System

Natural numbersIntegersRational and Real numbers
Fundamental operations, addition, subtractionmultiplication, divisionSquare roots, Decimal fractions
Unitary methodtime and distancetime and work, percentages
Applications to simple and compound interest,Profit and lossratio and proportion, variation

Elementary Number Theory

Division algorithmFactorization TheoremEuclidean algorithm
Tests of divisibility by 2, 3, 4, 5, 9, and 11H.C.F. and L.C.MPrime and composite numbers
Logarithms to base 10, laws of logarithmsuse of logarithmic tablesMultiples and factors


  • Basic Operations
  • Solutions of quadratic equations
  • Simple factors
  • Simultaneous linear equations in two unknowns—analytical and graphical solutions.
  • Remainder Theorem
  • Practical problems leading to two simultaneous linear equations or in-equations in two variables or quadratic equations in one variable & their solutions.
  • H.C.F., L.C.M.
  • Theory of polynomials
  • The relation between its roots and coefficients (Only real roots to be considered).
  • Simultaneous linear in-equations in two variables and their solutions.
  • Set language and set notation, Rational expressions, and conditional identities, Laws of indices.


Sine ×, cosine ×, Tangent × when 0° < × < 90° Values of sin ×, cos ×, and tan ×, for ×= 0°, 30°, 45°, 60°, and 90°Simple trigonometric identities
Use of trigonometric tablesSimple cases of heights and distances


Lines and angles, Plane and plane figures, Theorems on

Properties of angles at a pointCongruency of trianglesThe concurrence of medians and altitudes,
Similar trianglesCircles and its properties including tangents and normals, (ix) LociProperties of angles, sides, and diagonals of a parallelogram, rectangle, and square
Parallel linesSides and angles of a triangle


surface area and volume of spheresAreas of figures which can be split up into these figures (Field Book)
Surface area and volume of cuboidstriangle and circle
lateral surface, and volume of right circular cones and cylindersAreas of squares


Graphical representation frequency polygonsBar charts
Measures of central tendency.Collection and tabulation of statistical data
Pie charts, etc.Histograms

Also check CDS exam complete info

CDS overview

CDS cut off

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