The SSC CHSL (Combined Higher Secondary Level) exam syllabus is divided into three tiers, each designed to assess different skills. Here's a detailed breakdown:

1. Tier-I: Computer-Based Examination (Objective Type)

Subjects and Topics

a. General Intelligence (Reasoning)

• Verbal Reasoning: Analogy, Classification, Coding-Decoding, Blood Relations, Direction Sense, Series (Number/Alphabet).
• Non-Verbal Reasoning: Pattern Recognition, Figure Series, Mirror Images, Embedded Figures.
• Logical Reasoning: Statement-Conclusion, Syllogism, Venn Diagrams.

b. General Awareness

• Static General Knowledge: History, Geography, Indian Polity, Indian Economy.
• Science: Biology, Physics, Chemistry, Computers.
• Current Affairs: National and International events.
• Miscellaneous: Books and Authors, Awards, Sports, Important Dates.

c. Quantitative Aptitude (Mathematics)

• Arithmetic: Number System, Simplification, Ratio & Proportion, Percentage, Profit & Loss, Time & Work, Simple & Compound Interest, Average.
• Algebra: Linear Equations, Algebraic Identities.
• Geometry: Triangle, Circle, and Quadrilateral properties.
• Mensuration: Area, Volume, and Perimeter of Geometrical Shapes.
• Trigonometry: Height and Distance, Trigonometric Ratios.
• Data Interpretation: Pie Charts, Bar Graphs, Line Graphs, Tables.

d. English Language

• Grammar and Vocabulary: Fill in the Blanks, Sentence Correction, Error Spotting, Synonyms/Antonyms.
• Comprehension: Reading Passages, Cloze Tests.
• Sentence Rearrangement: Ordering of Sentences.
• Idioms and Phrases: Commonly used expressions.

2. Tier-II: Descriptive Paper (Offline)

• Essay Writing: Topics related to current affairs, social issues, environmental concerns, etc. (200–250 words).
• Letter/Application Writing: Formal and informal letters based on official communication (150–200 words).
• Marks: 100
• Duration: 60 minutes (80 minutes for scribe).
• Qualifying Marks: 33%

3. Tier-III: Skill Test / Typing Test (Qualifying)

Typing Test (For LDC/JSA):

• English: 35 words per minute (wpm).
• Hindi: 30 words per minute (wpm).
• Duration: 10 minutes.

Skill Test (For DEO):

• Data Entry Speed: 8,000 key depressions per hour.
• Duration: 15 minutes.

Final Selection Criteria:

• Tier-I and Tier-II scores are considered for final merit.
• Tier-III is qualifying in nature.