Here is UPSC CDS syllabus . . . For IMA / INA / AFA You must appear in three subjects: English General Knowledge Elementary Mathematics For OTA (Officers’ Training Academy) You appear in two subjects only: English General Knowledge (Math is not required for OTA) For English Synonyms & Antonyms Spotting Errors / Sentence Improvement Fill in the Blanks Para-jumbles / Sentence Rearrangement Cloze Test Idioms & Phrases Active & Passive Voice, Direct & Indirect Speech Reading Comprehension passages General Knowledge History of India (Ancient, Medieval, Modern) Geography (India & World) Indian Polity & Constitution Economy (Basics) Science & Technology (everyday science - physics, chemistry, biology) Current Affairs (national/international events) Defence & Military Developments Environment & Ecology Sports, Awards, Books & Culture Mathematics -Arithmetic- Number system, HCF & LCM Percentages, Profit & Loss Time, Speed & Distance Time & Work, Simple & Compound Interest Ratio & Proport...