Help your students prepare for their Maths GCSE with this free Factor Trees worksheet of 44 questions and answers
Factor trees are used to find the prime factors of a number. Any number with two or more factors is called a composite number and can be written as a product of prime numbers.
To find the prime factors of a number we can use a prime factor tree with the given number at the top. We find a factor pair of the number and represent these on two branches. Next we find factor pairs of each of these numbers and continue in this way until we get to prime numbers. These prime numbers are the prime factors of the original number. We can write a number as a product of its prime factors by writing these prime factors in a product calculation, using exponents where appropriate.
Although multiple different prime factor trees could be created for a number, the final prime factorisation will always be the same. The prime factors of two or more numbers can be compared to find the lowest common multiple (LCM/least common multiple) or highest common factor (HCF/greatest common factor/GCF) of those numbers.
Looking forward, students can then progress to additional number worksheets, for example an equivalent fractions & ordering fractions worksheet or simplifying fractions worksheet.
There will be students in your class who require individual attention to help them succeed in their maths GCSEs. In a class of 30, it’s not always easy to provide.
Help your students feel confident with exam-style questions and the strategies they’ll need to answer them correctly with our dedicated GCSE maths revision programme.
Lessons are selected to provide support where each student needs it most, and specially-trained GCSE maths tutors adapt the pitch and pace of each lesson. This ensures a personalised revision programme that raises grades and boosts confidence.