SSC CHSL Quantitative Aptitude Syllabus Tier-I

Number Systems
Computation of Whole Number
Decimal
Fractions
Relationship between numbers
Fundamental arithmetical operations
Percentages
Ratio and Proportion
Square roots
Averages
Interest (Simple and Compound)
Profit and Loss
Discount
Partnership Business
Mixture and Allegation
Time and distance
Time and work
Algebra
Basic algebraic identities of School Algebra
Elementary surds
Graphs of Linear Equations
Geometry
Triangle and its various kinds of centres
Circle and its chords
Congruence and similarity of triangles
tangents
angles subtended by chords of a circle
common tangents to two or more circles
Mensuration
Triangle
Quadrilaterals
Regular Polygons
Circle
Right Prism
Right Circular Cone
Right Circular Cylinder
Sphere
Hemispheres
Rectangular Parallelepiped
Regular Right Pyramid with triangular or square Base
Trigonometry
Trigonometry
Trigonometric ratios
Complementary angles
Height and distances 
Standard Identities
Statistical Charts
Tables and Graphs
Histogram
Frequency polygon
Bar-diagram
Pie-chart