Practice Questions

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 | 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 video is a tutorial on solving two quantitative aptitude problems related to profit and loss, presented by an instructor. The first problem, from an Accenture exam, involves finding the percentage loss (b%) when a man sells 12 units of a product at $10 with a loss of b% and then sells 12 units at $12 with a profit of b%. The instructor uses a 'short trick' method, setting up the equation 10/(100-b) = 12/(100+b) and solving for b, which results in b = 11%. The second problem, from an L&T Infotech exam, asks for the selling price of the second cycle to achieve an overall 15% profit, given that the first cycle was sold at a 20% loss. The instructor uses a 'short trick' method, calculating the total cost price (Rs. 2400), the desired total selling price (Rs. 2760), and the selling price of the first cycle (Rs. 960), leading to the final answer of Rs. 1800. The video uses a green chalkboard for calculations and includes on-screen text for the questions and options.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a title card showing a 3D figure on a balance scale with 'PROFIT' and 'LOSS' on either side, setting the theme of the lesson. It then transitions to a screen displaying the first problem (Q1) from an Accenture exam. The problem states: 'Mr. Ajay Devgan sold 12 Vimal Paan Masala at 10 dollars had a loss of b% and again sold 12 Vimal at 12 dollars had a profit of b%. Find the value of b?'. The options are a) 10%, b) 9.09%, c) 8%, d) 11%. The instructor, Yash Jain Sir, introduces the problem and the 'short trick' method to solve it, which involves equating the cost price (CP) from both transactions. The on-screen text also includes a meme with the text 'Kya kha rahi ho?' and 'Chocolate' and 'Vimal khaya karo'. The instructor begins to write the first part of the equation on the green board: 'Rs. = Rs. / (100-b) = 12 / (100+b)'. The video also shows a banner at the bottom with social media links for the 'Knowledge Gate Educator'.

  2. 2:00 – 5:00 02:00-05:00

    The instructor continues to solve the first problem on the green chalkboard. He writes the equation 10/(100-b) = 12/(100+b) and proceeds to cross-multiply, writing '10(100+b) = 12(100-b)'. He then expands the equation to '1000 + 10b = 1200 - 12b'. The instructor combines like terms, writing '10b + 12b = 1200 - 1000', which simplifies to '22b = 200'. He then divides both sides by 22, writing 'b = 200/22', which simplifies to 'b = 100/11'. He concludes that b = 9.09%, which corresponds to option (b). The on-screen text 'Short Trick' is visible, and the instructor explains that this method is faster than the traditional approach. The video also shows a banner at the bottom with social media links for the 'Knowledge Gate Educator'.

  3. 5:00 – 7:55 05:00-07:55

    The video transitions to the second problem (Q2) from an L&T Infotech exam. The problem states: 'A man buys two cycles for Rs. 1200 each, he sells first cycle at a loss of 20%, if he desires to get a profit of 15% on whole, for how much he should sell his 2nd cycle?'. The options are a) Rs. 2000, b) Rs. 1500, c) Rs. 1800, d) Rs. 1700. The instructor introduces the 'short trick' method. He calculates the total cost price (CP) as 1200 + 1200 = Rs. 2400. He then calculates the desired total selling price (SP) for a 15% profit as 2400 * 1.15 = Rs. 2760. He calculates the selling price of the first cycle at a 20% loss as 1200 * 0.8 = Rs. 960. He then subtracts the first cycle's SP from the total desired SP: 2760 - 960 = Rs. 1800. The instructor concludes that the answer is Rs. 1800, which is option (c). The video ends with a 'THANKS FOR WATCHING' screen.

The video presents a structured tutorial on solving profit and loss problems using efficient 'short trick' methods. It begins with a problem where the same percentage loss and profit are applied to different selling prices, requiring the student to find the percentage value by equating the cost price. The solution involves setting up a proportion and solving a linear equation. The second problem is a classic two-item transaction where the goal is to find the selling price of the second item to achieve a desired overall profit, given the loss on the first. The instructor demonstrates a methodical approach by calculating the total cost, the total desired revenue, and then the required revenue from the second item. The core learning objective is to apply these shortcuts to solve complex problems quickly, which is essential for competitive exams.

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