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Topic	Content	Duration	Watch
Digit Sum Method	Digit Sum of Numbers Digit Sum of Arithmetic Expresn Digit Sum in Addition Digit Sum in Subtraction Digit Sum in Multiplication Square of Numbers Perfect Square Number Cube of Numbers Perfect Cube Number Division of Numbers Digit Sum in Division Digit Sum of Percentage/ Decimals Examples on use of DSM	1hr 23min	Watch
Percentage	Basic Definition Confusion Points Percentage to Fraction Some Imp Concepts Successive Percentage Basic Examples Successive Percentage Que Student Pass-Fail Election - Voting General Examples Use in Mensuration Relational Components Venn Diagram	2hr 35min	Watch
Ratio & Proportion	Basic Definition Distribution in Ratios Use of Ratios Example on Distribution Properties of Ratios Terminologies of Ratios Simplification of Ratios Relation b/w Ratios Example on Relation b/w Ratios Basic Questions Word Problems on Ratios Use in Aptitude	2hr 17min	Watch
Partnership	Concept Example Overview Investment Time is same Distribution of Profit Calculation of Investment Calculation of Time of Investment Redistribution of Profit Conditional distribution of Profit Concept of Partnership in General Life	1hr 24min	Watch
Average & Weighted Average	Basic Definition Average Calculation [ BASIC, DSM & Standard Deviation] Missing Observation [ BASIC, DSM & Standard Deviation] Average by Visualization: Example Cricket Batsman Average of repeated Observations Reduction of big Observations to small Introduction to WEIGHTED AVERAGE Examples on WEIGHTED AVERAGE Alligation Technique in Average Calculation Properties of Average Average of Imp. Number Series Examples based on Basic & Digit Sum Method Examples based on Number Series Examples based on Weighted Average Examples based on Average Speed Examples on removal/addition/modification of Observations	2hr 52min	Watch
Unitary Method	Basic Use in Two Dimensions/Quantity Use in Three Dimensions/Quantity Use Speed Distance & Time Use in Radian to Degree Conversion Use in Food Consumption Use in Work Time Wages Moderate level Examples	32min	Watch
Work Time Wages	Introduction Pre-requisite: Unitary Method Pre-requisite: Proportionality Pre-requisite: Efficiency Standards for Solving any Que Logic Behind ScoreKhel Formula ScoreKhel Formula Simple Examples Three Persons Question Alternate Working days Efficiency Work & Wages Work & Wages with Efficiency more than one Identical Persons	1hr 59min	Watch
Pipes & Cistern	ScoreKhel formula Revision ScoreKhel formula in Pipes & Cistern Two Pipes are filling a Tank Leak in the Tank Two Filling and one Draining Pipes One Filling and one Draining Pipes Pipes opened at different times Ratio of work done by Pipes Pipes opening [Moderate level] Alternate opening of Pipes Filling of Tank with known capacity Moderate level Questions	1hr	Watch
Speed Distance and Time	Content Overview Basic Concept \|km/hr to m/s\| Average Speed Relation b/w Speed Distance & Time of Two Bodies Use of Alligation method Basic Examples Example:Increase in Speed Examples:Travelling at different Speeds Example:Travelling by two persons Example:Reaching late and early Example:Travelling & returning Example:Train meets an Accident Examples:Average Speed Relative Speed Introduction Example:Persons moving in same Direction Example:Train Crossing Platform Example:Trains moving towards each other Example:Persons moving towards each other Example:Person sitting inside Train Example:Tiger catching Deer Trains moving towards each other [Moderate Level] Example:Hunter Shooting Running Tiger Example:Sound heard while Driving Car Examples: Boat & Stream Boat & Stream Moderate Level Ques Examples:Races between two Persons Examples:Races between multiple Persons Examples:Races on Circular Path	2hr 28min	Watch
Profit, Loss & Discount	Terms Profit \| Loss \| Discount Profit \| Loss \| Discount Calculation Successive Discount in Brief Examples: Assumption Method Basic examples Moderate level examples Subsequent Selling of Products Successive Discount in Detail Successive Discount formula Successive Discount Exercise Examples: Successive Discount Successive Discount [Moderate Level] S.P. & C.P. dependency [Unitary method] Increase/ decrease in Price of Goods Mixed\|Part\|Rotten\|Free - Goods Use of Alligation Method Mixed / Part Selling of Goods Same Selling Price of Two Articles Examples Moderate Level Dishonest Seller Profit & loss	3hr 34min	Watch
Simple and Compound Interest	Concept SI & CI Calculation of SI Calculation of CI ROI - half yearly/quarterly etc Examples of SI [Easy Level] Examples of SI [Moderate Level] Examples of CI [Easy Level] CI with different ROI every year CI when the amount becomes n times More Examples of CI CI when the T is in mixed fraction CI and SI on the same Sum CI when interest is compounded 8 monthly Example of CI [Moderate Level] Summary SI & CI Relation between SI & CI Examples on relation between SI & CI Instalments in SI & CI Examples on Instalments	2hr 59min	Watch
Trigonometry	Angles & sides of Triangle Pythagoras Triplets Trigonometric Ratios (T.R.) Trigonometric Identities Sine & Cosine Law Law of Tangent Imp.Concept of Rt.Triangle (90°±θ) Trigonometric Ratios of Imp Angles Trigonometric Ratios of Higher Angles Examples of T.R. of higher Angles Notes for T.R. of Higher Angles Example-θ lies in the 4th Quadrant Examples-sides of rt-angled Triangle Examples-Imp angles of T.R. Examples-Identities of T.R. Examples-(90° ± θ) Concept of Trigonometry Examples-Generalized Equations [Hit & Trial] Examples-Conditional Equations [Quadratic] Examples-Conditional Equations [Mix Format] Examples-Conditional Equations [Identical Powers] Examples-Conditional Equations [Algebraic Identities] Examples-Conditional Equations [Simplification] Examples-Conditional Equations [Difficult] Sum & difference of Angles (A ± B) in T.R. Formulae in Sum & Difference of Angles Sum & Product of T.R. Examples-sum/difference of Angles & TR Maxima Minima [Range] Maxima Minima [Graph] Maxima Minima of Standard Equations Maxima Minima [AM & GM] Maxima Minima [Concept & Rules] Maxima Minima [Examples]	3hr 37min	Watch
Height & Distance	Angle of Elevation & Depression Example of Simple Trigonometric Ratio Example-Change in the angle of elevation Example-Change in the value of tangent Example-Angle of elevation doubles Example-distance moved on change in elevation Example-Angles of elevations are complementary Example-Broken post/tree Example-Climbing/Demining the ladder Example-Chimney at the top of Building Example-Flag at the top of Building Example-Moving Airplane vertically above Example-Speed of Moving Airplane Example-Shadow & Angle of elevation of Sun Example-Height according to shadow Example-Change in elevation of sun & shadow Example-Same elevation from vertices of Triangle Example-Two poles connected by wire Example-Two poles on either side of road Example-Two poles & elevations are complementary Example-Two poles and elevations from foot Example-elevation from foot and top of Tree Example-Height of Airplane b/w river banks Example-Depression from a height to two objects Example-Two Posts on either side of road Example-Depression from top of one pole to other Example-Angle of Depression & Elevation mix Example-Based on Hills Example-Moving Car & change in depression	1hr 4min	Watch

Full Syllabus in 1 Video [Contains Everything basic to advance]

Digit Sum Method

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Percentage

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Ratio & Proportion

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Partnership

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Average & Weighted Average

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Unitary Method

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Work Time Wages

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Pipes & Cistern

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Speed Distance and Time

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Profit, Loss & Discount

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Simple and Compound Interest

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Trigonometry

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Height & Distance

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Ytube Answers

Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, and pipe C alone can empty the full tank in x hours. All the pipes were opened together at 10:30 AM, but C was closed at 2:30 PM. If the tank was full at 8:30 PM on the same day, then what is the value of x?