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HCF and Lowest Common Multiple (F)

Welcome to our GCSE HCF and Lowest Common Multiple quiz, where we're about to unravel the mysteries of numbers and find common ground! But before we dive into the depths of mathematical concepts, let's kick things off with a captivating video that explores the fascinating world of snakes.

Do you know your factors from your multiples? Can you list the first 10 prime numbers? Being able to find the Highest Common Factor (HCF) and Lowest Common Multiple (LCM) of two numbers will help you when it comes to working with fractions, but there are also many real-life applications that use them. See how good you are in this GCSE Maths quiz.

When dealing with factors and multiples, the first thing to get right is which way round they go! A FACTOR goes into a number, and a MULTIPLE comes out of a number. All numbers have at least 2 factors – 1 and the number itself. You can list the factors of a number by writing them in pairs. The multiples of a number are simply the times tables of that number.

You can also break a number down into its PRIME factors. For example, 12 can be written as 22 x 3. This is a useful technique for large numbers, particularly if finding HCF or LCM of 2 numbers.

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You can find more about this topic by visiting BBC Bitesize - Multiples and factors

Author:  Sally Thompson

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