IGCSE – Number – Tim Gan Math Online Courses

N1.1 Prime Numbers and Composite Numbers 6 Topics

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N1.1 Conceptual Bridging: Prime Numbers

N1.1 Worked Example 1 (Test for Prime Numbers)

N1.1 Practice Now 1 Question 1

N1.1 Worked Example 2 (Problem Involving a Prime Number)

N1.1 Practice Now 2 Question 1

N1.1 Practice Now 2 Question 2

N1.2 Prime Factorisation and Its Applications 11 Topics

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N1.2 Worked Example 1 (Why and How do we Prime Factorise?)

N1.2 Practice Now 1 Question 1

N1.2 Worked Example 2 (Finding the Square and Cube Roots using Prime Factorisation)

N1.2 Worked Example 3 (Explanation of Perfect Squares and Cubes)

N1.2 Worked Example 4 (Changing a number to a Perfect Cube)

N1.2 Worked Example 5 (Higher Order Thinking Questions)

N1.2 Exercise Question 1

N1.2 Exercise Question 2

N1.2 Exercise Question 3

N1.2 Exercise Question 4

N1.2 Exercise Question 5

N1.3 Highest Common Factor 6 Topics

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N1.3 Worked Example 1 (Introduction to Highest Common Factor)

N1.3 Practice Now 1 Question 1

N1.3 Worked Example 2 (HCF by Prime Factorisation

N1.3 Practice Now 2 Question 1

N1.3 Worked Example 3 (Applications of Highest Common Factor)

N1.3 Worked Example 4 (Applications of Highest Common Factor)

N1.4 Lowest Common Multiples 11 Topics

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N1.4 Worked Example 1 (Lowest Common Multiple Introduction)

N1.4 Worked Example 2 (Lowest Common Multiple Introduction)

N1.4 Practice Now 1 Question 1

N1.4 Worked Example 3 (Applications of LCM)

N1.4 Worked Example 4 (Applications of LCM)

N1.4 Worked Example 5 (Applications of LCM)

N1.4 Exercise Question 1

N1.4 Exercise Question 2

N1.4 Exercise Question 3

N1.4 Exercise Question 4

N1.4 Exercise Question 5

N1.5 Real Numbers 9 Topics

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N1.5.1 Conceptual Bridging: Negative and Positive Numbers

N1.5 Practice Now 1 Question 1

N1.5 Practice Now 1 Question 2

N1.5 Practice Now 1 Question 3

N1.5.2 Conceptual Bridging: Integers

N1.5 Practice Now 2 Question 1

N1.5 Practice Now 2 Question 2

N1.5.3 Conceptual Bridging: Rational and Irrational Numbers

N1.5 Practice Now 3 Question 1

N2.1 Rounding Off 6 Topics

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N2.1 Conceptual Bridging: Rounding Off

N2.1 Worked Example 1 (Rounding Off)

N2.1 Worked Example 2 (Rounding Off)

N2.1 Practice Now 1 Question 1

N2.1 Practice Now 1 Question 2

N2.1 Worked Example 3 (Rounding Off)

N2.2 Significant Figures 4 Topics

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N2.2 Conceptual Bridging: Rules of Significant Figures

N2.2 Worked Example 1 (Rounding off to a Required Number of Significant Figures)

N2.2 Worked Example 2 (Rounding Off to a Required Number of Significant Figures with Use of a Calculator)

N2.2 Worked Example 3 (Application of Significant Figures)

N2.3 Approximation and Estimation 6 Topics

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N2.3 Worked Example 1 (Estimation of Computations using Significant Figures)

N2.3 Practice Now 1 Question 1

N2.3 Worked Example 2 (Better Value for Money)

N2.3 Practice Now 2 Question 1

N2.3 Practice Now 2 Question 2

N2.3 Practice Now 2 Question 3

N2.4 Upper and Lower Bounds

N2.5 Calculating Upper and Lower Bounds (Extended)

N3.1 Addition and Subtraction involving Negative Numbers 7 Topics

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N3.1 Conceptual Bridging 1: Addition involving Negative Numbers

N3.1 Worked Example 1 (Addition involving Negative Numbers)

N3.1 Practice Now 1 Question 1

N3.1 Conceptual Bridging 2: Subtraction involving Negative Numbers

N3.1 Worked Example 2 (Subtraction involving Negative Numbers)

N3.1 Worked Example 3 (Subtraction and Addition of Negative Numbers)

N3.1 Practice Now 3 Question 1

N3.2 Multiplication and Division involving Negative Numbers 5 Topics

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N3.2 Conceptual Bridging: Multiplication involving Negative Numbers

N3.2 Worked Example 1 (Multiplication of Negative Numbers)

N3.2 Practice Now 1 Question 1

N3.2 Worked Example 2 (Division of Negative Numbers)

N3.2 Practice Now 2 Question 1

N3.3 Combined Operations of Numbers 24 Topics

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N3.3 Worked Example 1 (Combined Operations of Numbers)

N3.3 Practice Now 1 Question 1

N3.3 Worked Example 2 (Combined Operations involving Fractions)

N3.3 Practice Now 2 Question 1

N3.3 Practice Now 2 Question 2

N3.3 Worked Example 3 (Multiplication of Decimals)

N3.3 Worked Example 4 (Division of Decimals)

N3.3 Practice Now 3 Question 1

N3.3 Exercise Question 1

N3.3 Exercise Question 2

N3.3 Exercise Question 3

N3.3 Exercise Question 4

N3.3 Exercise Question 5

N3.3 Exercise Question 6

N3.3 Exercise Question 7

N3.3 Exercise Question 8

N3.3 Exercise Question 9

N3.3 Exercise Question 10

N3.3 Exercise Question 11

N3.3 Exercise Question 12

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N3.4 Applications of Negative Numbers in Real Life 7 Topics

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N3.4 Worked Example 1

N3.4 Practice Now 1 Question 1

N3.4 Practice Now 1 Question 2

N3.4 Exercise Question 1

N3.4 Exercise Question 2

N3.4 Exercise Question 3

N3.4 Exercise Question 4

N4.5 Calculations with Fractions

N4.6 Changing a Fraction to a Decimal

IGCSE – Number

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