Greatest Common Factor (GCF) Worksheet generator
BackIn the produced worksheet, kids will find greatest common factors for the problems generated.
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About this worksheet
Suits Years 5 to 7Find the biggest number that divides both given numbers: the GCF of 8 and 12 is 4; of 18 and 27 is 9.
The straightforward method: list each number s factors and take the largest in common. Speed comes from knowing the times tables inside out, which is half the point.
How to make your worksheet
- Choose the number of problems and the limits.
- Press Generate for a fresh page.
- Print it. Answers included.
Every press of Generate lays out a fresh sheet, ready to print on A4.
Common questions
GCF s day job?
Simplifying fractions in one stroke: 18/27 divided top and bottom by their GCF 9 gives ⅔, fully reduced, no repeat visits. Also fair-sharing puzzles: the largest equal bundles two quantities allow.
What if the GCF is 1?
Then the numbers are called coprime, like 8 and 15, and the fraction 8/15 is already in lowest terms. GCF 1 is an answer, not a failure.