## Course Curriculum

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• 2

### 2. Multiplication (using Base Method)

• 2.0 Introduction to Base Method

• 2.1 Case 1: Base Method (When Both numbers are below Working Base)

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• Quiz: Case 1

• 2.2 Case 2: Base Method (When Both numbers are above Working Base)

• Quiz: Case 2

• 2.3 Case 3: Base Method (When one number is below and another is above Working Base)

• Quiz: Case 3

• 2.4 Case 4: Base Method (Two Different Working Bases)

• Quiz 4: Case 4

• 2.5 Case 5: Base Method (Not nearer to Working Base)

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### 4. Multiplication (Special Cases)

• 4.1 Multiplication by Repeating 9s (×99; ×999; ×9999;×99999; etc.)

• 4.2 Multiplication when Final Digits Added up gives Power of 10

• 4.3 Multiplication by 11

• 4.4 Multiplication by 12

• 4.5 Multiplication by 5, 25 and 125

• 4.6 Miscellaneous Examples

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### 5. Introduction to Division

• 5.0 Introduction to Division

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### 6. Division (using Transpose and Apply)

• 6.1 Introduction to Vinculum Numbers

• 6.2 Division (using Transpose and Apply - Above Working Base)

• 6.3 Division (using Transpose and Apply - Above Working Base - Some More Examples)

• 6.4 Division (using Transpose and Apply - Below Working Base)

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### 7. Division (using Flag Method)

• 7.1 Division (using Flag Method)

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### 9. Subtraction

• 9.1 Subtraction using "All from 9 and Last from 10"

• 9.2 Subtraction using Purification

• 9.3 Subtraction (using Bases)

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### 11. Square Roots

• 11.1 Introduction to Square Roots

• 11.2 Case 1: Square Roots of Perfect Square Numbers

• 11.3 Finding Duplex of Numbers

• 11.4 Case 2: Square Roots of Perfect and Imperfect Square Numbers

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### 12. Cubes

• 12.1 Cubes (Using Surpluses)

• 12.2 Cubes (Using Complements)

• 12.3 Cubes (using Proportionately)

• 12.4 Cubes of Bigger Numbers (using Criss Cross Method)

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### 13. Cube Roots

• 13.1 Introduction to Cube Roots

• 13.2 Cube Roots of Perfect Cube Numbers

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### 14. Digit Sums

• 14.1 Introduction to Digit Sums

• 14.3 Digit Sums (Subtraction)

• 14.4 Digit Sums (Multiplication)

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### 15. Divisibility

• 15.1 Divisibility Rules (1 to 10)

• 15.2 Introduction to Negative Osculators

• 15.3 Checking Divisibility using Negative Osculators

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