🧮 Prime Factorisation, HCF, and LCM

Master the fundamentals of prime factorisation and learn how to find the highest common factor and lowest common multiple of numbers. **What you'll learn:** - Identify and list prime factors of numbers - Calculate the highest common factor (HCF) of two or more numbers - Calculate the lowest common multiple (LCM) of two or more numbers - Use prime factorisation to solve real-world problems - Apply HCF and LCM in practical contexts

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Question 1
Which of the following is a prime number?
Question 2
$1$ is classified as a prime number.
Question 3
The prime factorisation of $12$ is $2^{___} \times 3^{___}$
Question 4
What is the prime factorisation of $36$ ?
Question 5
The HCF (highest common factor) of two numbers is always smaller than or equal to the smaller of the two numbers.
Question 6
What is the highest common factor (HCF) of $24$ and $36$ ?
Question 7
The lowest common multiple (LCM) of $4$ and $6$ is ___
Question 8
The LCM of two numbers is always greater than or equal to the larger of the two numbers.
Question 9
Two numbers have a product of $360$ and an HCF of $6$ . What is their LCM?
Question 10
Three bells ring at intervals of $8$ , $12$ , and $18$ seconds respectively. After how many seconds will all three bells ring together for the first time?