SSC CHSL Tier I syllabus
Each section shows the notice's own topic list, then every SSC topic we teach, marked as shared with CGL or not in the CHSL list.
Source: official SSC CHSL 2025 notice, Para 13.9 (pages 20–21). The sub-topics are our study breakdown, not official weightings.
English Language (Basic Knowledge)
What the notice lists (Para 13.9.1)
Spot the Error · Fill in the Blanks · Synonyms/ Homonyms · Antonyms · Spellings/ Detecting mis-spelt words · Idioms & Phrases · One word substitution · Improvement of Sentences · Active/ Passive Voice of Verbs · Conversion into Direct/ Indirect narration · Shuffling of Sentence parts · Shuffling of Sentences in a passage · Cloze Passage · Comprehension Passage
Grammar and error detection
Shared with CGLNotice wording: Spot the Error
Sentence improvement
Shared with CGLNotice wording: Improvement of Sentences
Vocabulary
Shared with CGLNotice wording: Synonyms/ Homonyms, Antonyms, Spellings
One-word substitution
Shared with CGLNotice wording: One word substitution
Idioms and phrases
Shared with CGLNotice wording: Idioms & Phrases
Sentence completion
Shared with CGLNotice wording: Fill in the Blanks
Voice and narration
Shared with CGLNotice wording: Active/ Passive Voice, Direct/ Indirect narration
Sentence organisation
Shared with CGLNotice wording: Shuffling of Sentence parts, Shuffling of Sentences in a passage
Cloze passages
Shared with CGLNotice wording: Cloze Passage
Reading comprehension
Shared with CGLNotice wording: Comprehension Passage
General Intelligence
What the notice lists (Para 13.9.2)
Semantic Analogy · Symbolic operations · Symbolic/ Number Analogy · Trends · Figural Analogy · Space Orientation · Semantic Classification · Venn Diagrams · Symbolic/ Number Classification · Drawing inferences · Figural Classification · Punched hole/ pattern-folding & unfolding · Semantic Series · Figural Pattern-folding and completion · Number Series · Embedded figures · Figural Series · Critical Thinking · Problem Solving · Emotional Intelligence · Word Building · Social Intelligence · Coding and de-coding · Numerical operations · Other sub-topics, if any
Analogies
Shared with CGLNotice wording: Semantic Analogy, Symbolic/ Number Analogy, Figural Analogy
Classification
Shared with CGLNotice wording: Semantic Classification, Symbolic/ Number Classification, Figural Classification
Sequences
Shared with CGLNotice wording: Semantic Series, Number Series, Figural Series
Coding and decoding
Shared with CGLNotice wording: Coding and de-coding, Word Building
Symbolic calculations
Shared with CGLNotice wording: Symbolic operations, Numerical operations
Relationships and ordering
Not named ("other sub-topics")Notice wording: Other sub-topics, if any
Not named in the list, which ends with “Other sub-topics, if any”. Revise it if time allows.
Spatial reasoning
Shared with CGLNotice wording: Space Orientation
Logical inference
Shared with CGLNotice wording: Venn Diagrams, Drawing inferences
Figure transformations
Shared with CGLNotice wording: Punched hole/ pattern-folding & unfolding, Figural Pattern-folding and completion, Embedded figures
Observation and matching
CGL onlyJudgment and problem solving
Shared with CGLNotice wording: Critical Thinking, Problem Solving, Trends
Social and emotional reasoning
Shared with CGLNotice wording: Emotional Intelligence, Social Intelligence
Quantitative Aptitude (Basic Arithmetic Skill)
What the notice lists (Para 13.9.3)
Number Systems · Percentages · Ratio and Proportion · Square roots · Averages · Interest (Simple and Compound) · Profit and Loss · Discount · Partnership Business · Mixture and Alligation · Time and distance · Time and work · Algebra · Geometry · Mensuration · Trigonometry · Statistical Charts
Number foundations
Shared with CGLNotice wording: Number Systems, Square roots
Percentage
Shared with CGLNotice wording: Percentages
Ratio and proportion
Shared with CGLNotice wording: Ratio and Proportion
Averages
Shared with CGLNotice wording: Averages
Interest calculations
Shared with CGLNotice wording: Interest (Simple and Compound)
Commercial arithmetic
Shared with CGLNotice wording: Profit and Loss, Discount
Partnership shares
Shared with CGLNotice wording: Partnership Business
Mixtures
Shared with CGLNotice wording: Mixture and Alligation
Work rates
Shared with CGLNotice wording: Time and work
Motion problems
Shared with CGLNotice wording: Time and distance
Algebra
Shared with CGLNotice wording: Algebra
Plane geometry
Shared with CGLNotice wording: Geometry
Area and volume
Shared with CGLNotice wording: Mensuration
Trigonometry
Shared with CGLNotice wording: Trigonometry
Reading numerical charts
Shared with CGLNotice wording: Statistical Charts
General Awareness
What the notice lists (Para 13.9.4)
Environment around him and its application to society · Current events · Everyday observation and experience in their scientific aspect · India and its neighbouring countries: History, Culture, Geography, Economic Scene, General policy and scientific research
History
Shared with CGLNotice wording: History
Culture
Shared with CGLNotice wording: Culture
Geography
Shared with CGLNotice wording: Geography
Indian polity
Shared with CGLNotice wording: General policy
Economic awareness
Shared with CGLNotice wording: Economic Scene
Everyday science
Shared with CGLNotice wording: Everyday observation in their scientific aspect, Scientific research
Environment and society
Shared with CGLNotice wording: Environment around him and its application to society
Current affairs
Shared with CGLNotice wording: Current events