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हिन्दी भाग -1 (Hindi Grammar & Varnamala Part 1)
2020-05-18
First uploaded lecture: Roy Sir introduces himself and teaches Hindi Varnamala & pronunciation specifically for Bengali-speaking aspirants.
Marathon Race । Marathon Running in Kandi
2023-07-22
Outdoor endurance road-running trial in Kandi for Army Agniveer, SSC GD, and WBP physical efficiency test preparation.
Anup Roy (Ex AEC) — Roy Defence Academy Campus & Training Overview
2020-07-30
Visual montage of Hon. Sub. Maj. Anup Kumar Roy (Retd.), classroom whiteboard teaching, courtyard written tests, and campus batches.
Army Agniveer Practice Set 50 — Full Solved Paper
2023-08-19
Milestone 50th full practice set for Indian Army Agniveer GD & Clerk written exam with step-by-step board solutions.
Army Agniveer Practice Set 12 — Solved Question Paper
2023-07-28
Solved practice paper Set 12 covering arithmetic, general science, and reasoning for Army Agniveer recruitment.
Delhi Police Constable Solved Paper (08 Dec 2017 Shift 2)
2020-11-12
Complete whiteboard solution of the official Delhi Police Constable 08 Dec 2017 Shift 2 previous-year paper.
Delhi Police Constable Solved Paper (08 Dec 2017 Shift 1)
2020-11-08
Worked solutions and time-saving tricks for Delhi Police Constable 08 Dec 2017 Shift 1 examination paper.
MATHEMATICS For Army Agniveer (GD) Question Paper Set - 2
2023-07-22
Full Agniveer GD mathematics question paper Set 2 solved on the whiteboard by Roy Sir.
MATHEMATICS For Army Agniveer (GD) Bhag 1a — Model Practice Paper
2023-07-16
Foundational Army Agniveer GD mathematics paper walkthrough focusing on high-frequency arithmetic questions.
Army Agniveer GD & SSC GD Maths Practice Paper (16 July 2023)
2023-07-16
Classroom practice paper solutions for Agniveer GD and SSC GD quantitative aptitude.
Army Agniveer GD Maths Solved Practice Set 25
2023-08-05
Mid-series Agniveer GD Practice Set 25 covering ratio, percentage, and mensuration problems.
Reasoning for SSC GD — Number Series & Coding Shortcuts
2024-08-22
Rapid reasoning pattern recognition for SSC GD Constable and paramilitary written examinations.
Alphabet Problems in Reasoning — For SSC GD, IBPS & Railway
2020-08-14
Complete lecture on English alphabet position values, reverse order pairs, and letter-series questions for SSC GD, IBPS, and Railway.
Reasoning: Rows & Ranks (पंक्ति और क्रम व्यवस्था)
2020-08-21
How to solve left-right ranking, total persons in a row, and overlapping position questions without confusion.
Reasoning: Venn Diagrams (वेन आरेख / ভেন চিত্র)
2020-09-02
Logical Venn diagram classification and intersection problems asked in SSC GD, WBP, and Railway exams.
Reasoning Trick: Counting Squares & Figures in 5 Seconds
2023-11-19
Short whiteboard demonstration showing how to count embedded squares in symmetric and asymmetric grids instantly.
Reasoning: Blood Relations & Direction Sense for Defence Exams
2020-09-10
Step-by-step tree diagrams for blood relations and compass direction distance problems.
Mathematics (LCM & HCF) for WBP Lady Constable 2023
2023-08-26
Dedicated WBP Lady Constable lecture on Lowest Common Multiple and Highest Common Factor word problems.
Mathematics (Simplifications) for WBP Lady Constable 2023
2023-08-31
BODMAS, continued fractions, and algebraic simplification tricks tailored for WBP Lady Constable aspirants.
Time and Work (Part-6) / समय और कार्य (भाग -6) Shortcut Tricks
2020-07-18
Efficiency ratios and men-days-hours formula (M1D1H1 = M2D2H2) explained with exam examples.
Mathematics (Time and Work) in Hindi — Alternating Days & Leaving Early
2023-09-04
Solving complex Time & Work problems where workers leave before completion or work on alternate days.
Number System (संख्या पद्धति) for SSC GD, MTS, WBP, KP
2023-10-06
Unit digits, divisibility rules, remainder theorem, and sum of natural numbers for SSC GD, MTS, WBP, and Kolkata Police.
SQUARE ROOTS & CUBE ROOTS (Part 3) — Rapid Extraction Method
2020-04-15
Finding square roots and cube roots of large perfect numbers and decimals in seconds.
LCM & HCF (ल.स.प. और म.स.प.) — Complete Concept & Ratio Tricks
2020-06-11
Product of two numbers = LCM × HCF, ratio-based HCF questions, and bell-tolling interval problems.
Boat and Stream (नाव और धारा / নৌকা ও স্রোত) — Downstream & Upstream
2020-07-25
Clear formulas for speed in still water, stream velocity, and round-trip river navigation problems.
Compound Interest (चक्रवृद्धि ब्याज / চক্রবৃদ্ধি সুদ) Without Long Formulas
2020-08-03
Tree method and fraction method to find 2-year and 3-year Compound Interest and CI-SI difference.
Profit and Loss in Bengali (লাভ ও ক্ষতি) — SSC GD 2025 & WBP Short
2024-09-18
Bengali-medium shortcut for calculating profit percentage when cost price of X articles equals selling price of Y articles.
Profit And Loss (लाभ और हानि) — SSC GD 2025 Hindi Short
2024-09-13
Fast ratio method for Profit & Loss problems targeted at SSC GD 2025 aspirants.
Profit And Loss (लाभ और हानि) — Dishonest Dealer & Discount Trick
2024-09-15
One-line shortcut for successive discount and marked-price profit questions.
Mathematics Profit & Loss for SSC GD — Selling at Two Prices
2024-09-01
Finding cost price immediately when an item sold at a loss is sold for ₹X more to earn a profit.
Profit & Loss (लाभ और हानि) — Quick Whiteboard Trick
2023-12-15
Solving fraction-based profit and loss percentages without pen-heavy equations.
Percentage Part-2 for SSC GD 2025, MTS & CHSL
2024-08-29
Percentage increase/decrease and consumption expenditure adjustment formula for SSC GD, MTS, and CHSL.
Simplification & BODMAS Rapid Trick (सरलीकरण)
2023-10-21
Avoiding common bracket and division-before-multiplication traps in BODMAS exam questions.
Simplification — Continued Fraction Ladder Trick
2023-10-18
Channel's most-viewed 29-second Short showing how to solve ladder fractions horizontally in 5 seconds.
Simplification — Algebraic Identity (a² - b²) Shortcut
2023-11-02
Using algebraic identities to cancel large decimal expressions in competitive maths papers.
Average (औसत / গড়) — Consecutive Numbers & Replacement Trick
2023-11-10
Finding the new average when a member joins or replaces another in a group without multiplying totals.
Indices & Surds (घातांक और करणी / সূচক ও করণী) Part 1
2023-11-25
Comparing surds and finding the largest/smallest radical expression in seconds.
Indices & Surds Part 2 — Infinite Nested Square Roots
2023-11-28
Factoring n into consecutive integers to solve √(n + √(n + ...)) instantly.
Square Root (वर्गमूल / বর্গমূল) Non-Perfect Number Trick
2023-12-04
Approximating square roots of non-perfect squares accurately to two decimal places.
TIME AND WORK (For SSC GD, WBP Constable, Agniveer)
2023-10-04
35-second whiteboard formula for combined work of A and B using product-over-sum.
Ratio & Proportion (অনুপাত ও সমানুপাত) — Bengali Medium Short
2024-08-18
Combining A:B and B:C into A:B:C rapidly in Bengali for WBP Constable and SSC GD.