CDS — Syllabus & notes
Syllabus and study notes
Revision & Exam Traps· 9 formulae · 4 traps
Maths · Quadratics
Check the discriminant first: D>0 two real roots, D=0 equal, D<0 none. Don’t solve before checking nature.
Maths · Differentiation
Maths · Integration
Maths · Progressions
Maths · Coordinate Geometry
Maths · Trigonometry
sin²θ means (sinθ)², not sin(θ²) — a notation trap that changes the value.
Maths · Permutations & Combinations
Maths · Probability
Maths · Binomial Theorem
Maths · Counting
nPr is ordered (arrangements), nCr is unordered (selections). “Arrange” → P, “choose” → C.
Strategy
CDS Elementary Maths rewards speed on basics — percentages, ratio, mensuration, time-work. Don’t over-invest in one hard sum.
CDS Syllabus (2025)
9 subjects · 68 topics
Select a topic from the list to start revising.