Presentación: LCM, HCF & Prime Factors: Year 7

Creada por

Neelam Bhabra

Malasia

Jugador

Acierto

tiempo

Neelam Bhabra

3 de Mayo de 2026

% 100

00:53

Anónimo

7 de Septiembre de 2026

% 100

07:44


LCM, HCF & Prime Factors: Year 7Versión en línea Learn LCM, HCF, and prime factors por Neelam Bhabra 1 Slide 1: Welcome Welcome, Year 7! Today we explore LCM, HCF, common multiples, common factors, and prime factors with examples and practice. 2 Slide 2: What is LCM? LCM stands for least common multiple—the smallest number that two or more numbers divide into evenly. 3 Slide 3: What is HCF? HCF is the highest common factor—the largest number that divides two or more numbers exactly. 4 Slide 4: Common Multiples Common multiples are multiples that appear in the lists of two numbers. Example: 12 is a common multiple of 3 and 4. 5 Slide 5: Common Factors Common factors divide two numbers. Example: 1, 2, and 5 are common factors of 10 and 20. 6 Slide 6: Prime Factors Prime factors are the prime numbers that multiply to give a number. Factor trees help us see them clearly. 7 Slide 7: How the Video Works Watch a short video showing how to find LCM, HCF, and prime factors step by step. 8 Slide 8: Example Problem Find the LCM of 6 and 8. List factors, compare multiples, and identify the smallest common one. 9 Slide 9: Practice MCQ Question: What is the HCF of 18 and 24? A) 6 B) 12 C) 3 D) 9 10 Slide 10: Quick Challenge Challenge: Find the LCM of 9, 12, and 15. Show steps and check with prime factors. 11 Welcome to HCF, LCM & Prime Factors Welcome! Dive into HCF, LCM, common factors, common multiples, and prime factors with videos, examples, and interactive checks. Let’s learn by exploring together! 12 What is HCF? HCF = highest common factor. Discover common factors of numbers and how to spot the biggest one. Video explains the idea with simple steps: 13 Finding HCF — Example Find HCF of 18 and 24. Prime factorise: 18 = 2×3×3, 24 = 2×2×2×3. Common: 2 and 3 → HCF = 6. 14 What is LCM? LCM = least common multiple. It is the smallest number divisible by both numbers. Video shows step-by-step method. 15 Finding LCM — Example LCM of 4 and 6: multiples of 4: 4,8,12...; multiples of 6: 6,12... → LCM = 12. 16 Common Factors vs Common Multiples Common factors: numbers that divide both. Common multiples: numbers both can divide into. Use lists or prime factors for clarity. 17 Prime Factors Overview Prime factors are the primes that multiply to give a number. E.g., 60 = 2×2×3×5. Video shows factor trees. 18 Interactive Quick Quiz 1 Which is a common factor of 24 and 36? A) 4 B) 6 C 8 19 Interactive Quick Quiz 2 What is the LCM of 5 and 8? A) 40 B) 45 C) 80 20 Wrap-Up & Quick Practice Review: HCF, LCM, factors, multiples, and prime factors. Try a new pair of numbers and create a factor tree to check your understanding.

LCM, HCF & Prime Factors: Year 7Versión en línea

Learn LCM, HCF, and prime factors

por Neelam Bhabra

Slide 1: Welcome

Welcome, Year 7! Today we explore LCM, HCF, common multiples, common factors, and prime factors with examples and practice.

Slide 2: What is LCM?

LCM stands for least common multiple—the smallest number that two or more numbers divide into evenly.

Slide 3: What is HCF?

HCF is the highest common factor—the largest number that divides two or more numbers exactly.

Slide 4: Common Multiples

Common multiples are multiples that appear in the lists of two numbers. Example: 12 is a common multiple of 3 and 4.

Slide 5: Common Factors

Common factors divide two numbers. Example: 1, 2, and 5 are common factors of 10 and 20.

Slide 6: Prime Factors

Prime factors are the prime numbers that multiply to give a number. Factor trees help us see them clearly.

Slide 7: How the Video Works

Watch a short video showing how to find LCM, HCF, and prime factors step by step.

Slide 8: Example Problem

Find the LCM of 6 and 8. List factors, compare multiples, and identify the smallest common one.

Slide 9: Practice MCQ

Question: What is the HCF of 18 and 24?
A) 6 B) 12 C) 3 D) 9

Slide 10: Quick Challenge

Challenge: Find the LCM of 9, 12, and 15. Show steps and check with prime factors.

Welcome to HCF, LCM & Prime Factors

Welcome! Dive into HCF, LCM, common factors, common multiples, and prime factors with videos, examples, and interactive checks. Let’s learn by exploring together!

What is HCF?

HCF = highest common factor. Discover common factors of numbers and how to spot the biggest one. Video explains the idea with simple steps:

Finding HCF — Example

Find HCF of 18 and 24. Prime factorise: 18 = 2×3×3, 24 = 2×2×2×3. Common: 2 and 3 → HCF = 6.

What is LCM?

LCM = least common multiple. It is the smallest number divisible by both numbers. Video shows step-by-step method.

Finding LCM — Example

LCM of 4 and 6: multiples of 4: 4,8,12...; multiples of 6: 6,12... → LCM = 12.

Common Factors vs Common Multiples

Common factors: numbers that divide both. Common multiples: numbers both can divide into. Use lists or prime factors for clarity.

Prime Factors Overview

Prime factors are the primes that multiply to give a number. E.g., 60 = 2×2×3×5. Video shows factor trees.

Interactive Quick Quiz 1

Which is a common factor of 24 and 36?

A) 4
B) 6
C 8

Interactive Quick Quiz 2

What is the LCM of 5 and 8?

A) 40
B) 45
C) 80

Wrap-Up & Quick Practice

Review: HCF, LCM, factors, multiples, and prime factors. Try a new pair of numbers and create a factor tree to check your understanding.

Puedes integrar el juego en un LMS compatible con LTI 1.1 o LTI 1.3 como Canvas, Moodle, o Blackboard. De esta manera podrás guardar las puntuaciones automáticamente en el libro de calificaciones de esa plataforma.

LCM, HCF & Prime Factors: Year 7

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