Practice Questions

Duration: 11 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 | Digital Logic Systems: Digital Systems & Boolean Basics, Logic Gates & Hardware, Combinational Circuit, Sequential Circuits
  10. Paper-2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Calculus, Relational Algebra, SQL, NoSQL
  11. Paper-2 | Data Structures & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Algorithm Analysis, Sorting Algorithms, Intro to Compilers, Hashing
  12. Paper 2 | Data Communication and Network Security: Introduction to CN, Data Communication, Data Link Layer - Ethernet, DLL: Error Control, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Application Layer, Hardware basics, Network Security, Ethical Hacking
  13. Paper-2 | Operating Systems: Introduction to OS, Process Management, Memory Management, File Management, Deadlock
  14. Paper-2 | Computer Organization and Architecture: 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, Number System, Number Representation
  15. Paper 2 | System Analysis and Design: Fundamentals of Systems and Information Systems, Fundamentals of Software Engineering, SDLC and Development Approaches, Software Documentation and Software Requirements Specification (SRS), SDD and Quality Assurance, Security, Risk Management & Maintenance, Software Testing
  16. Paper-2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  17. Paper 2 | OOPS , C++ , JAVA: Language Design, OOPS with C++, Java, .Net Programming, Java Fundamentals
  18. 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
  19. Emerging Trends and AI: Emerging Tech Trends, कंप्यूटर के मूल सिद्धांत / Computer Fundamentals, व्यापार, विपणन एवं उपभोक्ता संरक्षण / Trade, Marketing and Consumer Protection
  20. Paper-2 | Data Processing (Ms-Office): MS Office Applications, कंप्यूटर सॉफ़्टवेयर / Computer Software, ऑपरेटिंग सिस्टम / Operating System, वर्ड प्रोसेसिंग (MS Word) / Word Processing (MS Word), प्रेज़ेंटेशन (MS PowerPoint) / Presentation Software (MS PowerPoint)
  21. Paper-2 | Internet and Web Technologies: HTML Basics, CSS, XML, JavaScript-Basics, Internet Fundamentals, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, Terms & Abbreviations, Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, साइबर सुरक्षा / Cyber Safety and Security, कंप्यूटर नेटवर्क / Computer Networks
  22. Paper 2 | Pedagogy: वृद्धि और विकास / Growth and Development, विकास के सिद्धांत / Theories of Development, Concept of Pedagogy, समावेशी शिक्षा / Inclusive Education, Experiential Pedagogy, आकलन और मूल्यांकन / Assessment and Evaluation, संज्ञानात्मक प्रक्रियाएँ / Cognitive Processes, समाजीकरण और जेंडर / Socialisation and Gender, National Education Policy (NEP) 2020
  23. Live Classes: RSSB Live Sessions
  24. Paper 1 - Full Mock Tests:
  25. Paper 2 - Full Mock Tests:
  26. BCI Previous Year Papers:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video is a lecture on calculating profit in scenarios involving dishonest weight practices, a common topic in aptitude and placement exams. The instructor begins by presenting a problem where a shopkeeper sells onions at a 10% profit but uses a weight that is 20% less than the original. He then introduces a general formula for calculating total profit: (Profit% + Decrease% in weight) / (100 - Decrease% in weight) * 100. He applies this formula to solve the first problem, arriving at a total profit of 37.5%. The lecture continues with a second example, where a shopkeeper claims to sell per kg but uses 960 grams instead of 1 kg, and a third example with a fruit vendor using 900 grams for a kg. The instructor consistently uses the same formula to solve each problem, demonstrating its application. The video concludes with a final summary of the method and a thank you message.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a conceptual image of a 3D figure standing on a seesaw, with 'PROFIT' in green on one side and 'LOSS' in red on the other, symbolizing the balance of financial outcomes. The scene then transitions to a lecture format, where the instructor presents the first problem: 'A shopkeeper sells onion on a profit of 10%. The weight he uses is 20% less than original weight. What will be his total profit?'. The options are listed as a) 17.5%, b) 27.5%, c) 37.5%, d) 47.5%. The instructor introduces the problem, which is noted as an 'IMPORTANT QUESTION ASKED IN IBM EXAM (2018)'. The visual includes a humorous image of a woman crying while holding a small onion in a box, with a tweet overlay about onion prices, adding a comedic element to the serious topic.

  2. 2:00 – 5:00 02:00-05:00

    The instructor begins to solve the first problem by writing the formula for total profit on a green chalkboard. The formula is clearly written as: Profit% = (Profit% + decrease% in weight) / (100 - decrease% in weight) * 100. He then substitutes the values from the problem: Profit% = 10 and Decrease% in weight = 20. The calculation is shown step-by-step: (10 + 20) / (100 - 20) * 100, which simplifies to 30 / 80 * 100. The instructor explains that this calculation results in 37.5%. He confirms that the correct answer is option (c) 37.5%. The visual shows the instructor's hand writing the formula and calculations in yellow chalk, with the problem statement and options visible at the top of the screen.

  3. 5:00 – 10:00 05:00-10:00

    The instructor moves to a second problem: 'A shopkeeper claims to sell per kg NIRMA on the cost price but he uses a weight of 960 grams instead of 1 Kg. How much percentage of profit he earns by doing this?'. He applies the same formula, writing it on the board: Profit% = (Profit% + decrease% in weight) / (100 - decrease% in weight) * 100. He identifies the profit% as 0 (since he sells at cost price) and the decrease% in weight as (1000 - 960) / 1000 * 100 = 4%. The calculation becomes (0 + 4) / (100 - 4) * 100, which is 4 / 96 * 100. He simplifies this to 25 / 6, which equals 4 + 1/6%. He then presents a third problem: 'A dishonest fruit vendor sells his goods at Cost Price, but he uses 900 gm instead of 1 kg weight, his gain percent is'. He applies the formula again, with profit% = 0 and decrease% in weight = 10%. The calculation is (0 + 10) / (100 - 10) * 100 = 10 / 90 * 100 = 100 / 9 = 11 + 1/9%. The instructor emphasizes that this is a standard method for solving such problems.

  4. 10:00 – 10:35 10:00-10:35

    The video concludes with a final summary of the method. The instructor reiterates the formula for calculating profit when a dishonest shopkeeper uses a lesser weight. The screen displays a blue, abstract background with the text 'THANKS FOR WATCHING' in large white letters. The instructor's voiceover thanks the viewers for watching and mentions that a quiz containing important previous year IT companies' questions will be discussed at the end of the video, encouraging viewers to watch until the end.

The video provides a clear and structured lesson on a specific type of profit and loss problem. It begins by introducing a real-world scenario involving a dishonest shopkeeper, which is a common theme in aptitude tests. The core of the lesson is the derivation and application of a single, powerful formula: Profit% = (Profit% + decrease% in weight) / (100 - decrease% in weight) * 100. The instructor demonstrates this formula with three distinct examples, each with different values, reinforcing the method's versatility. The progression from a simple problem to more complex ones, all solved using the same formula, effectively teaches a universal problem-solving technique. The use of a green chalkboard for calculations and clear, step-by-step writing makes the method easy to follow and replicate for students preparing for competitive exams.

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