Short Trick Find Day on a Particular Date

Duration: 8 min

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Inside: a video lesson and guided study material.

Module outline

  1. About the Course: About the Course
  2. Paper-1 & 2 | Basic Numeracy: अनुपात और समानुपात / Ratio and Proportion, Divisibility Rules, मिश्रण और एलिगेशन / Mixture and Alligation, Permutation and Combination, Logarithm, संख्या पद्धति / Number System, महत्तम समापवर्तक और लघुत्तम समापवर्त्य / HCF and LCM, Sequence and Series (Series), समय, चाल और दूरी / Time, Speed and Distance, प्रतिशत / Percentage, औसत / Average, घन क्षेत्रमिति / Solid Mensuration, Age Problems, Arithmetic, Statistics, Probability, लाभ, हानि और बट्टा / Profit, Loss and Discount, साधारण और चक्रवृद्धि ब्याज / Simple and Compound Interest, Partnership, Speed Mathematics and Basic Mathematics, Algebra, सरलीकरण, घातांक और करणी / Simplification, Indices and Surds, समय और कार्य / Time and Work, Pipe and Cistern, RSSB Specific Videos - Basic Numeracy, समुच्चय, संबंध, फलन और विविक्त गणित / Sets, Relations, Functions and Discrete Mathematics, संख्या पद्धति और संख्या सिद्धांत / Number Systems and Number Theory, निर्देशांक ज्यामिति, सदिश और त्रिविमीय ज्यामिति / Coordinate Geometry, Vectors and 3D Geometry, बहुपद, समीकरण और सम्मिश्र संख्याएँ / Polynomials, Equations and Complex Numbers
  3. Paper-1 & 2 | Data Interpretation: आँकड़ा निर्वचन / Data Interpretation
  4. Paper-1 & 2 | General Mental Ability: Mental Ability, RSSB Specific Videos - Mental Ability
  5. Paper-1 & 2 | Logical Reasoning and Analytical Ability: श्रेणी / Series, कूट लेखन एवं कूट वाचन / Coding-Decoding, Data Sufficiency, अशाब्दिक तर्क / Non-Verbal Reasoning, Syllogisms, बैठक व्यवस्था एवं पहेलियाँ / Seating Arrangement and Puzzles, रक्त संबंध / Blood Relations, दिशा एवं दूरी / Direction and Distance, Analytical Reasoning (Counting Figures Reasoning), गणितीय संक्रियाएँ एवं लुप्त संख्या / Mathematical Operations and Missing Numbers, कैलेंडर एवं घड़ी / Calendar and Clock, Clock, घन, पासा एवं आकृतियों की गिनती / Cubes, Dice and Figure Counting, वेन आरेख, न्याय वाक्य एवं असमानता / Venn Diagrams, Syllogism and Inequalities, सादृश्यता एवं वर्गीकरण / Analogy and Classification, क्रम एवं रैंकिंग / Order and Ranking, कथन आधारित तार्किक विवेचन / Statement-Based Reasoning, Data Arrangement, वर्णमाला एवं संख्या परीक्षण / Alphabet and Number Test, Crypt Arithmetic
  6. Paper-1 & 2 | Decision Making and Problem Solving: आँकड़ों की पर्याप्तता एवं निर्णय क्षमता / Data Sufficiency and Decision Making
  7. Paper-1 | General Science: वैज्ञानिक उपलब्धियाँ और अनुसंधान / Scientific Achievements and Research, Biology, Chemistry, RSSB Specific Videos
  8. Paper-1 | General Awareness: राज्य विशेष सामान्य ज्ञान / State-Specific General Knowledge, समसामयिकी / Current Affairs
  9. Paper-2 | Fundamentals of Computer: Basics of COA, Number System, Floating Point Rep, Number Representation
  10. Paper - 2 | Digital Logic Systems: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits
  11. Paper-2 | Operating Systems: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Linux OS, Distributed Systems
  12. Paper-2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Relational Calculus, File Organization & Indexing, Transaction Management, Concurrency Control
  13. Paper-2 | Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  14. Paper-2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  15. Paper 2 | Oops, C++, Java: Language Design, OOPS with C++, Java, .Net Programming, Java Fundamentals
  16. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  17. Paper 2 | Emerging Trends and AI: Emerging Tech Trends, कंप्यूटर के मूल सिद्धांत / Computer Fundamentals, व्यापार, विपणन एवं उपभोक्ता संरक्षण / Trade, Marketing and Consumer Protection, कंप्यूटर नेटवर्क / Computer Networks
  18. Paper-2 | Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Advanced Algorithms
  19. Paper 2 | Data Communication and Network Security: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security, Ethical Hacking
  20. Paper-2 I Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  21. Paper-2 | Computer Organization and Architecture: Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations
  22. Paper-2 | Web Development: JavaScript-Basics, HTML Basics, CSS, XML
  23. Pedagogy: वृद्धि और विकास / Growth and Development, Concept of Pedagogy, संज्ञानात्मक प्रक्रियाएँ / Cognitive Processes, विकास के सिद्धांत / Theories of Development, समावेशी शिक्षा / Inclusive Education, Experiential Pedagogy, समाजीकरण और जेंडर / Socialisation and Gender, National Education Policy (NEP) 2020
  24. Live Sessions: RSSB Live Sessions
  25. RSSB Paper 1 - Full Mock Tests:
  26. RSSB Paper 2 - Full Mock Tests:
  27. SCI Previous Year Papers:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a tutorial on solving calendar-based aptitude questions, specifically determining the day of the week for a given date. The instructor, Yash Jain, uses a step-by-step method involving the division of the year into its constituent parts (thousands, hundreds, tens, and units) and applying a formula to calculate the total number of odd days. The process begins by breaking down the year 1987 into 1600 + 300 + 80 + 7. The number of odd days for each component is determined using a provided table: 1600 years contribute 0 odd days, 300 years contribute 1 odd day, 80 years contribute 2 odd days, and 7 years contribute 1 odd day. The sum of these odd days (0 + 1 + 2 + 1 = 4) is then used to find the day of the week. The instructor then adds the number of days in the months preceding September (January to August) and the days of September itself, calculating the total number of days. This total is divided by 7, and the remainder is used to determine the final day of the week, which is concluded to be Monday. The video also includes a second example for the date 22 October 1964, demonstrating the same method. The video concludes with a 'Thanks for Watching' screen.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a title card showing a calendar and the word 'CALENDAR'. It then transitions to a lecture format with a blackboard background. The main question is displayed: 'On what day does 28 September 1987 lie?'. A table on the left lists the number of odd days for different century years (100, 200, 300, 400, etc.). The instructor begins the solution by writing '1987' on the board and starts to break it down into its components: 1600 + 300 + 80 + 7. He explains that the number of odd days for 1600 years is 0, and for 300 years is 1, referencing the table.

  2. 2:00 – 5:00 02:00-05:00

    The instructor continues the calculation for 1987. He writes '80' and calculates the number of odd days for 80 years, which is 2. He then writes '7' and calculates the odd days for 7 years, which is 1. He adds these values: 0 (from 1600) + 1 (from 300) + 2 (from 80) + 1 (from 7) = 4. He then moves to the months, writing 'Jan -> 31', 'Feb -> 28', 'Mar -> 31', 'Apr -> 30', 'May -> 31', 'Jun -> 30', 'Jul -> 31', 'Aug -> 31'. He adds these days: 31+28+31+30+31+30+31+31 = 243. He then adds the 28 days of September, resulting in a total of 243 + 28 = 271 days. He writes '271' and begins to divide it by 7.

  3. 5:00 – 7:41 05:00-07:41

    The instructor completes the division of 271 by 7, writing '271 / 7 = 38 weeks and 5 odd days'. He then adds the 4 odd days from the year calculation to the 5 odd days from the month calculation, resulting in a total of 9 odd days. He divides 9 by 7, getting a remainder of 2. He states that 0 corresponds to Sunday, 1 to Monday, and 2 to Tuesday. However, he then corrects himself, stating that the remainder 2 corresponds to Monday. He then moves to the second question: 'On what day does 22 October 1964 lie?'. He breaks down 1964 into 1600 + 300 + 60 + 4. He calculates the odd days for 1600 (0), 300 (1), 60 (2), and 4 (1), summing to 4. He then adds the days of the months from January to September (31+29+31+30+31+30+31+31+30 = 274) and the 22 days of October, totaling 296. He divides 296 by 7, getting a remainder of 1. He adds this to the 4 odd days from the year, getting 5. He divides 5 by 7, getting a remainder of 5, which he states corresponds to Friday. The video ends with a 'Thanks for Watching' screen.

The video presents a structured, step-by-step method for solving calendar problems. The core concept is the calculation of 'odd days'—the remainder when the number of days in a period is divided by 7. The method involves breaking down the year into its constituent parts (1600, 300, 100, 10, 1) and using a table to find the number of odd days for each. These are summed, and then the number of days from the beginning of the year to the target date is added. The total is divided by 7, and the remainder determines the day of the week. The video demonstrates this process for two different dates, 28 September 1987 and 22 October 1964, reinforcing the method through repetition and application.

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