
Greatest common factor
Free printable Grade 7 math worksheet for "Greatest common factor" — practice number theory. No-prep, print or assign online.
This worksheet provides challenging problems focused on finding the greatest common factor (GCF) for Grade 7 students. Teachers can use it to reinforce number theory concepts and enhance students' problem-solving skills related to factors and multiples. The exercises include prime factorization and application-based questions to deepen understanding of GCF.
Learning objectives
- Identify the greatest common factor (GCF) of two or more numbers using prime factorization.
- Apply the concept of GCF to solve real-world problems involving factors and multiples.
- Analyze pairs of numbers to determine their GCF and explain the reasoning process.
Answer Key

How to use this worksheet
- Click “Download Worksheet” to get the PDF — free with a KiwiBee account (up to 50 downloads a month).
- Print at home or in class for Middle School; it's no-prep, with no extra materials needed.
- Use the included answer key to mark it in seconds.
Frequently asked questions
Is the “Greatest common factor” worksheet free?
Yes. “Greatest common factor” is a free printable Math worksheet. Sign in with a free KiwiBee account to download the PDF — it includes up to 50 downloads a month.
What grade or age is this Math worksheet for?
It's designed for Middle School (ages 11–14), covering Number theory.
Does it come with an answer key?
Yes — a matching answer key is included so you can grade it in seconds.
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