Free printable practice
Greatest Common Factor Gcf 3 Numbers 2 100 Practice Activities
Printable Class 6 maths worksheets for finding the greatest common factor of three numbers from 2 to 100 using factor lists and prime factors.
Practice that builds confidence
From factors to the GCF of three numbers
These Class 6 maths practice activities help children find the greatest common factor, or GCF, of three numbers between 2 and 100. Learners practise listing factors, comparing common factors, and choosing the largest factor shared by all three numbers.
The printable worksheets include focused factoring questions, mixed number sets, and space for working. They are useful after children understand factors of a single number and are ready to extend the idea to three numbers at once.
Finding the GCF of three numbers means looking for the largest number that divides all three exactly. For example, with 24, 36, and 60, children can list factors or use prime factorisation to see that 12 is common to all three and no larger common factor works.
How the practice progresses
These worksheets keep the number range from 2 to 100 so the focus stays on reasoning, not large calculations. Early questions encourage clear factor lists such as 1, 2, 3, 4, 6, 12. Later sets mix even numbers, odd numbers, multiples, and cases where the GCF is 1, helping learners recognise when three numbers have no common factor greater than 1.
Parent routine at home
Ask your child to choose the smallest of the three numbers first, list its factors in order, and test those factors against the other two numbers. A simple routine is: read the three numbers, write factors of the smallest number, circle the factors that divide the second number, then check those against the third. Have your child explain why the final answer is the greatest, not just a common factor.
Classroom uses for teachers
Teachers can use these pages during the factoring unit, for independent practice, small-group support, or quick maths centres. They also work well as a bridge to simplifying fractions, finding common denominators, and understanding divisibility. Pair work is effective: one learner lists factors while the other checks each candidate by division.
Common errors to watch for
Children may find the GCF of only two of the numbers, choose the first common factor they see, or confuse greatest common factor with least common multiple. Some also miss factor pairs, especially for numbers such as 48, 72, or 96. Encourage neat factor lists and checking divisibility for all three numbers.
Free printable PDF download
Use this Class 6 GCF of 3 numbers worksheet page to preview the activity, print it, or download it as a PDF for quick practice. It works well for homework, homeschool lessons, tutoring, morning work, revision, and classroom centers.
Answers and answer key support
After the child completes the worksheet independently, parents and teachers can use the answer support or answer key information to check the work, review mistakes, and choose the next practice step.
Why iBloom worksheets help
The questions are tightly focused on GCF of three numbers within 2 to 100, so children get repeated practice with the exact Class 6 factoring skill. A useful child-friendly strategy is: “Start small, test all three, then pick the biggest.” This keeps the process organised and reduces guessing.
Helpful answers
Frequently asked questions
What skill do these Class 6 worksheets practise?
They practise finding the greatest common factor of three numbers between 2 and 100 by listing factors, comparing common factors, and checking divisibility.
Is GCF the same as HCF?
Yes. GCF, or greatest common factor, is the same idea as HCF, or highest common factor. Both mean the largest number that divides the given numbers exactly.
How should a child find the GCF of three numbers?
A good method is to list the factors of the smallest number, test each factor against the other two numbers, and select the largest factor that divides all three.
Do the worksheets include numbers above 100?
No. The practice is limited to numbers from 2 to 100, which is suitable for building accuracy with Class 6 factoring before moving to larger numbers.
What is a common mistake in GCF of three numbers?
A common mistake is finding a factor shared by only two numbers and using it as the answer. The GCF must divide all three numbers exactly.
Is this Class 6 GCF of 3 numbers worksheet free?
Yes. You can preview it for free and use the printable worksheet for home or classroom practice.
Can I download this Class 6 GCF of 3 numbers worksheet as a PDF?
Yes. Use the worksheet download option to save a printable PDF, or print the worksheet directly from the page.
Does this Class 6 GCF of 3 numbers worksheet include answers or an answer key?
When the activity has fixed answers, iBloom includes answer support so parents and teachers can check the completed worksheet.