• UPSC Exams Mains and Prelims Perviuos year papers from 1990-2020. • UPSC Syllabus for exams 2021-22. • Download and read the Previous Year Papers PDF. • UPSC Study Notes Like GK,Aptitude and Reasoning. • Last 20 year UPSC Exam Papers are As below Prelims papers With Answer Key of year 1990 to 2020 General Studies Paper 1 & 2 with Answer Key Mains General Studies papers of year 1990 to 2020 General Studies Paper 1 , 2 , 3 & 4 Mains Compulsory papers of year 1997 to 2020 Assamese ,