Short Trick Find Day on a Particular Date

Duration: 9 min

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Inside: a video lesson and guided study material.

Module outline

  1. About the course: About the Course
  2. Mathematical Aptitude: संख्या पद्धति / Number System, महत्तम समापवर्तक और लघुत्तम समापवर्त्य / HCF and LCM, Divisibility Rules, प्रतिशत / Percentage, अनुपात और समानुपात / Ratio and Proportion, औसत / Average, लाभ, हानि और बट्टा / Profit, Loss and Discount, समय और कार्य / Time and Work, घन क्षेत्रमिति / Solid Mensuration, साधारण और चक्रवृद्धि ब्याज / Simple and Compound Interest, समय, चाल और दूरी / Time, Speed and Distance, Age Problems, मिश्रण और एलिगेशन / Mixture and Alligation, Algebra, सरलीकरण, घातांक और करणी / Simplification, Indices and Surds, Pipe and Cistern, Trigonometry, Statistics, आँकड़ा निर्वचन / Data Interpretation, Arithmetic, 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. Logical Reasoning: श्रेणी / Series, कूट लेखन एवं कूट वाचन / Coding-Decoding, सादृश्यता एवं वर्गीकरण / Analogy and Classification, रक्त संबंध / Blood Relations, दिशा एवं दूरी / Direction and Distance, क्रम एवं रैंकिंग / Order and Ranking, अशाब्दिक तर्क / Non-Verbal Reasoning, बैठक व्यवस्था एवं पहेलियाँ / Seating Arrangement and Puzzles, Syllogisms, वेन आरेख, न्याय वाक्य एवं असमानता / Venn Diagrams, Syllogism and Inequalities, गणितीय संक्रियाएँ एवं लुप्त संख्या / Mathematical Operations and Missing Numbers, वर्णमाला एवं संख्या परीक्षण / Alphabet and Number Test, कथन आधारित तार्किक विवेचन / Statement-Based Reasoning, Analytical Reasoning (Counting Figures Reasoning), घन, पासा एवं आकृतियों की गिनती / Cubes, Dice and Figure Counting, कैलेंडर एवं घड़ी / Calendar and Clock, Clock
  4. General Knowledge: वैज्ञानिक उपलब्धियाँ और अनुसंधान / Scientific Achievements and Research, Chemistry, Biology, History, Geography, Polity, Indian Economy, समसामयिकी / Current Affairs, Static General Knowledge, राज्य विशेष सामान्य ज्ञान / State-Specific General Knowledge
  5. Art of Teaching: शिक्षण-अधिगम प्रक्रिया एवं कक्षा प्रबंधन / Teaching-Learning Process and Classroom Management, Learners & Learning Process, Factors Affecting Teaching, शिक्षण विधियाँ एवं उपागम / Teaching Methods and Approaches, सूक्ष्म शिक्षण एवं कक्षा संप्रेषण / Microteaching and Classroom Communication, शिक्षण सहायक सामग्री एवं शैक्षिक तकनीकी / Teaching Aids and Educational Technology, आकलन एवं मूल्यांकन / Assessment and Evaluation, शिक्षक: गुण, व्यावसायिक नैतिकता एवं विकास / Teacher: Qualities, Professional Ethics and Development, शैक्षिक नीतियाँ, अधिनियम एवं प्रशासन / Educational Policies, Acts and Administration, पाठ्यचर्या, कला एवं सह-शैक्षिक क्षेत्र / Curriculum, Arts and Co-curricular Areas, निर्देशन एवं परामर्श / Guidance and Counselling, दिव्यांग बच्चों की शिक्षा / Education of Children with Disabilities, Micro-Teaching & Teaching Skills, पाठ योजना / Lesson Planning
  6. Environmental Science: Environment
  7. Unit 1 | Digital Electronics: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  8. Unit 2 | COA: Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Programming the Basic Computer
  9. Unit 3 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  10. Unit 3 | Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  11. Unit 4 | Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  12. Unit 5 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management
  13. Unit 6 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Transaction Management, Concurrency Control
  14. Unit 7 | Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer
  15. Unit 8 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  16. Unit 9 | Object Oriented Programming: OOPS with C++
  17. Unit 10 | Web Development: HTML Basics, CSS, JavaScript-Basics, XML, Node.js, Git & Github, PHP
  18. Unit 11 | Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines
  19. Unit 12 | IoT: Emerging Tech Trends, Cloud Computing, कंप्यूटर नेटवर्क / Computer Networks
  20. Unit 13 | Artificial Intelligence: Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Natural Language Processing, Artificial Neural Networks, Genetic Algorithms
  21. Unit 14 | E-Commerce: Electronic Data Interchange and E-Commerce, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Physical Security and Cryptography Basics, Cyber Safety and Security
  22. Unit 15 | Multimedia: Multimedia
  23. Unit 16 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis, DSA using Python
  24. Full Length Mock Tests — General Paper:
  25. Full Length Mock Tests — Computer Science (Paper II):
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a tutorial on calculating the day of the week for a given date, using a method based on odd days. The instructor, Yash Jain, begins by posing the question, "On what day does 04 July 1997 lie?" and then systematically breaks down the calculation. The method involves three main steps: first, calculating the number of odd days for the year 1997 by breaking it into 1600 + 300 + 97; second, calculating the number of odd days for the months from January to June 1997; and third, adding the odd days from the year and months, then adding the day of the month (4) and taking the total modulo 7. The video uses a table to determine the number of odd days for different century years (e.g., 100 years = 5 odd days, 200 years = 3 odd days) and a list of the number of days in each month (e.g., Jan = 31, Feb = 28, etc.). The instructor demonstrates the calculation for 1997, arriving at a total of 121 odd days, which corresponds to 2 odd days (121 mod 7 = 2), indicating the day is Tuesday. The video then briefly shows a similar calculation for 26 May 1968, concluding with a humorous meme and a thank you message.

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 instructor, Yash Jain, introduces the topic with the question, "On what day does 04 July 1997 lie?". A table on the left side of the screen lists the number of odd days for different century years: 100 years = 5, 200 years = 3, 300 years = 1, and 400 years = 0. The instructor explains that the method involves calculating odd days for the year, the months, and the day itself.

  2. 2:00 – 5:00 02:00-05:00

    The instructor begins the calculation for 1997. He writes on the board, breaking the year into 1600 + 300 + 97. He uses the table to find the odd days: 1600 years have 0 odd days, 300 years have 1 odd day, and 97 years have 2 odd days (calculated as 96/4 = 24, plus 1 for the 97th year). The total for the year is 0 + 1 + 2 = 3 odd days. He then lists the number of days in each month from January to June: Jan (31), Feb (28), Mar (31), Apr (30), May (31), Jun (30). He calculates the total odd days for these months: 31 mod 7 = 3, 28 mod 7 = 0, 31 mod 7 = 3, 30 mod 7 = 2, 31 mod 7 = 3, 30 mod 7 = 2. The sum is 3 + 0 + 3 + 2 + 3 + 2 = 13, which is 13 mod 7 = 6 odd days. The total odd days so far are 3 (from year) + 6 (from months) = 9.

  3. 5:00 – 8:34 05:00-08:34

    The instructor completes the calculation for 04 July 1997. He adds the day of the month (4) to the total odd days from the year and months (9), resulting in 9 + 4 = 13. He then calculates 13 mod 7 = 6, which means 6 odd days. He states that 0 odd days is Sunday, 1 is Monday, 2 is Tuesday, and so on, so 6 odd days is Saturday. However, he then corrects himself, stating that the total is 121 odd days (3 from year + 6 from months + 4 from day = 13, but the video shows 121 on the board, which is likely a typo or a different calculation path). He then shows the calculation for 26 May 1968, breaking it into 1600 + 300 + 67. He calculates the odd days for 1600 (0), 300 (1), and 67 (67/4 = 16, plus 1 for the 67th year, so 17 odd days). The total for the year is 0 + 1 + 17 = 18, which is 18 mod 7 = 4 odd days. He then adds the odd days for the months Jan to Apr (31+29+31+30 = 121, 121 mod 7 = 2) and the day (26, 26 mod 7 = 5). The total is 4 + 2 + 5 = 11, which is 11 mod 7 = 4, so the day is Thursday. The video ends with a meme and a "Thanks for watching" screen.

The video provides a step-by-step guide to solving a common aptitude test problem: finding the day of the week for a given date. The core method is the calculation of 'odd days,' which are the remainder when the number of days is divided by 7. The process is broken down into three parts: the year, the months, and the day. The instructor uses a table to quickly determine the number of odd days for centuries (e.g., 100 years = 5 odd days) and then applies the formula for leap years (number of leap years = total years / 4) to find the odd days for the remaining years. The number of days in each month is used to calculate the odd days for the months preceding the target month. The final step is to sum all the odd days and take the result modulo 7 to get the final day of the week. The video demonstrates this method for two different dates, 04 July 1997 and 26 May 1968, reinforcing the technique.

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