## Combined Defence Services ### SYLLABUS FOR COMBINED DEFENCE SERVICES EXAINATION

Exam Pattern:

 S.NO SUBJECTS QUESTIONS MARKS 1. English 120 100 2. General Knowledge 120 100 3. Elementary Mathematics 100 100 Total 340 300

 S.NO SUBJECTS QUESTIONS MARKS 1. English 120 100 2. General Knowledge 120 100 Total 240 200

 NOTE: The "Combined Defence Services" (CDS) Examination is conducted twice a year by the Union Public Service Commission (UPSC) for the recruitment of candidates into the Indian Military Academy, Officers Training Academy, Indian Naval Academy and Indian Air Force Academy.

 English 1. The question paper will be designed to test the candidates’ understanding of English and workmanlike use of words.

 General Knowledge 1. General Knowledge including knowledge of current events and of such matters of everyday observation and experience in their scientific aspects as may be expected of an educated person who has not made a special study of any scientific subject. The paper will also include questions on History of India and Geography of a nature which candidate should be able to answer without special study

 Elementary Mathematics ARITHMETIC ·        Number System- Natural numbers, Integers, Rational and Real numbers.      ·        Fundamental operations, addition, subtraction, multiplication, division, Square roots, Decimal fractions.      ·        Unitary method, time and distance, time and work, percentages,      ·        Applications to simple and compound interest, profit and loss,      ·        Ratio and proportion, variation. Elementary Number Theory-Division algorithm. Prime and composite numbers. Tests of divisibility by 2, 3, 4, 5, 9 and 11. Multiples and factors. Factorisation Theorem. H.C.F. and L.C.M. Euclidean algorithm. Logarithms to base 10, laws of logarithms, use of logarithmic tables. ALGEBRA ·   Basic Operations, simple factors, Remainder Theorem, H.C.F., L.C.M.,      ·  Theory of polynomials,      ·  solutions of quadratic equations, relation between its roots and coefficients (Only real roots to be considered).      ·  Simultaneous linear equations in two unknowns—analytical and graphical solutions.      ·  Simultaneous linear inequations in two variables and their solutions. Practical problems leading to two simultaneous linear equations or inequations in two variables or quadratic equations in one variable & their solutions.      ·    Set language and set notation, Rational expressions and conditional identities, Laws of indices. TRIGONOMETRY 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 tables. Simple cases of heights and distances. GEOMETRY Lines and angles, Plane and plane figures, Theorems on       ·        Properties of angles at a point,       ·        Parallel lines,       ·        Sides and angles of a triangle,       ·        Congruency of triangles,       ·        Similar triangles,       ·        Concurrence of medians and altitudes,       ·        Properties of angles, sides and diagonals of a parallelogram, rectangle and square,       ·        Circles and its properties including tangents and normals,       ·       Loci. MENSURATION ·        Areas of squares, rectangles, parallelograms, triangle and circle.       ·        Areas of figures which can be split up into these figures (Field Book),       ·        Surface area and volume of cuboids, lateral surface and volume of right circular cones and cylinders, surface area and volume of spheres STATISTICS ·        Collection and tabulation of statistical data,       ·        Graphical representation frequency polygons, histograms, bar charts, pie charts etc.       ·        Measures of central tendency.

Note: Please Download The Previous Year Question Paper From www.armyofficials.in to Know The Exact Exam Pattern & Level Of The Questions.