20-20 & 50-50 Series

70 High Yielding Topics for Prelims 

The Course

20-20 and 50-50 Series: ’70 High Yielding Topics for Prelims’

  • These are the extremely High Yielding topics for Prelims. These topics, along with 5 basic books are good enough to qualify the Prelims, even in the continuously changing and evolving pattern. 
  • This course, along with 5 Basic books, and Synopsis IAS Current Affairs Programme would be a decisive step for your Prelims.

From 2022 onwards, we are including CSAT Topics in this course as well.

  • This course covers the following subjects completely: Science and Technology, Internal Security, International relations, Governance and Social Justice. There are no standard books available for these subjects till date. 
  • 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.

UPSC is asking questions from these topics for past 40+ years. There is no reason that UPSC would not ask questions from these topics in the upcoming years.

UPSC has to ask questions from these topics. IF UPSC would stop asking questions from these topics, the Cut-offs would go below 70,, or may be even 50. 

From this course, 40+ questions were there in Prelims 2021. Click here to view.

From this course, 38 questions were asked in Prelims 2020. Click here to view.

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.


38 Questions in Prelims 2020

64 Questions in Prelims 2019

These are 70 high yielding topics for UPSC Prelims.

Designed by Krishna Sir

Course Duration: 50 hours

Validity: Till Prelims 2024

Course completion date: 15 days before Prelims.

38 Questions in Prelims 2020

UPSC Prelims 2020: “20-20 and 50-50 Series” and “Mains Seat Guarantee Programme (MSGP)” are the game changer courses for Prelims. This defines the value of Synopsis IAS, where we believe that the Previous year papers are the most precious source of success.

Direct questions from 20-20 and 50-50 Series:

  • Total 38 questions.
  • Set B Question no: 4, 6, 7, 9, 70, 17, 14, 15, 17, 19, 25, 27, 33, 36, 42, 43, 45, 54, 56, 57, 61, 62, 72, 75, 76, 77, 78, 79, 80, 81, 82, 85, 86, 87, 97, 92, 93, 95.

Direct questions from Mains Seat Guarantee Programme (MSGP):

  • Total 20 Questions. (No need to read any book).
  • Set B Question no: 1, 2, 5, 8, 12, 78, 20, 39, 51, 55, 63, 68, 70, 71, 73, 90, 96, 98, 99, 700

Topic List


  • 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.


  • 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. (6-7)
  • 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.


  • International Financial Institution
  • International Organizations and Bodies
  • Treaty and Agreements
  • India and Neighbourhood
  • Transport Corridors and Connectivity
  • West Asia
  • Important Places in News


  • 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.


  • 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






20-20 and 50-50 Series

Free Demo Content PDF

Science-Tech and Internal Security

2022 Edition

International Relations

Demo Content File


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. 3999

Rs. 2999

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

Rs. 7090

Rs. 5672

(20% Discount,

Use coupon Code: PTMSGPT20)

PT 360 + 20-20 & 50-50 Combo

Rs. 4098 Rs. 3598 (Rs. 500 Discount, Use Coupon Code: T20PT500)