20-20 and 50-50 Series 2021

70 High Yielding Topics for Prelims



58 Questions in Prelims 2020

64 Questions in Prelims 2019

These are 100 high yielding topics for UPSC Prelims.

Designed by Krishna Sir

Course Duration: 50 hours

Validity: Till Prelims 2022

Course completion date: 15 days before Prelims.

This course covers most important 70 topics for UPSC GS prelims exam in most comprehensive and lucid manner, which is helpful for the prestigious UPSC IAS and IFS Examinations.


  • British Policies: White racism; Social and Cultural Policy; Economic Policy; Land Tenure; Relation with Indian States; Foreign Policy; Policy for Local Bodies; Police Reforms; Army Reforms; Judicial Reforms; Civil Service Reforms; Education Policy; Policy for Press;
  • British Policies: Constitutional Development
  • Indian Response to British Policies: Trade Union; Peasant Revolt; Tribal and Civil Uprising.
  • Social Reform Movement: Name of Person; Organisation; Published Book/ Ideology.
  • Viceroy
  • Congress Sessions: Year; Location; President; Moto.
  • Freedom Struggle: Event; Personality; Chronology.

  • Ancient and Medieval: Important terms -one-liner. Includes Society and Administration.
  • Ancient and Medieval: Map, Capital, Port, and Rivers separating territory.
  • Vijaynagara Empire
  • Indian Literature
  • Indian Philosophy including Hinduism as a Religion.
  • Religion: Buddhism, Jainism, Bhaktism and Sufism.
  • Rock-cut Architecture
  • Travelers and their accounts.
  • GI Tags.
  • Tribes, with especial emphasis on PVTGs
  • Heritage: Intangible Heritage, World Heritage Sites
  • Miscellaneous Topics like Jhum; water-storing; viticulture etc. etc.

  • Nuclear Technology
  • Defence Technology
  • Space Technology: ISRO – PSLV; GSLV; Orbits.
  • Biotechnology
  • Nanotechnology
  • Computers and IT.
  • IPR issues.

  • Environmental Bodies: HQ; Aim; India is a member.
  • Treaty/Protocol: Origin; India is a member?; Objective. (8-10)
  • Indian Environment Laws: Like Air act, Water Act etc. (6-70)
  • Environmental Funds: Who; India is a member?; for whom/objective. For Example Green Climate Fund
  • Species: Protection Status (IUCN and Indian); Geographical distribution; State Bird/Animal.
  • Type of Pollutants: 2 NAQI
  • One Compilation to replace Shankar IAS.

  • Biomes and Climate: World
  • Natural Vegetation of India; not climate.
  • Protection Areas: Biosphere Reserves (18); National Parks; Tiger Reserves; Wildlife Sanctuaries; Ramsar Sites
  • Soils of India: ICAR-8; not World.
  • Southeast Asia; West Asia
  • Lines: (3 + 2 + 2): Countries; Cities; Seas/ Oceans.
  • Maps of India: Topic-wise
  • National Waterways
  • Previous Year Questions: Very Important

  • Monetary Policy: Components and Definition
  • Budget: Components and Definition
  • BOP: Components and Definition
  • National Income: GDP; Inflation.
  • Economics Survey: 15- 20 terms every year.
  • Indices: Who releases what? E.g CSO- WPI, CPI etc.
  • Note: Economy, for this course, has approx. 30 pages notes. This subject coincides with current affairs and with Geography.   

  • Nuclear Technology
  • Defence Technology
  • Space Technology: ISRO – PSLV; GSLV; Orbits.
  • Biotechnology
  • Nanotechnology
  • Computers and IT.
  • IPR issues

The Course

70 High Yielding Topics for Prelims

  • Extremely High Yielding topics for Prelims.
  • You can expect 20 to 40+ questions directly from these topics, and at least 50 questions indirectly. [Kindly remember that the cut-off itself is approx. 50%.]
  • Why such a high Hit rate in Prelims: Simple! These topics are made from UPSC Previous year papers. UPSC invariably asks these topics in Prelims for past 40+ years.
  • 20-20 meaning: Approx 20 topics. These are some small topics- Time to revise = approx. 20 minutes.
  • 50-50 meaning: Approx 50 topics. These are relatively larger topics- Time to revise = approx. 50 minutes.
  • This course, along with 5 Basic books, and Synopsis IAS Current Affairs Programme would be a decisive step for your Prelims.


UPSC Special Courses: Our Approach- Previous year Papers are the Key!

  • As a civil services aspirant, you must know that at least 80-90% of questions are repeated directly or indirectly in UPSC Mains, and at least 60-70% topics are repeated in UPSC Prelims.
  • Many a times, UPSC repeats exactly the same question.
  • Many a times, UPSC rephrases and changes the language, and repeats the same question.
  • Most of the times, UPSC repeats the topics. Examiner explores untouched dimensions, or asks applied questions.
  • Considering these facts, these special courses are designed while considering two parameters: UPSC Syllabus Plus Previous Year Question Papers.
  • Our all classroom lectures, content, and test Series are based on UPSC pattern. 

Our Methodology for content Development

We are a content-based coaching. We spend 6-8 hours for a 20-30 minute lecture to provide you the most comprehensive and Synoptic content for UPSC IAS (Indian Administrative Services) and IFS (Indian Forest Services).

  • The content is made from standard textbooks and reference books, and enriched using internet. This requires years of learning and understanding of the subjects. 
  • The content development team and faculty members are not the UPSC aspirants. For special courses, Krishna sir himself makes the content most of the times.


20 20 - 50 50 SERIES

Rs. 2999

PT 360 + MSGP 3 + 20-20 & 50-50 Combo

Rs. 7000

Rs. 5600

(20% Discount,

Use coupon Code: PTMSGPT20)

PT 360 + 20-20 & 50-50 Combo

Rs. 4498  

Rs. 4098