Greatest Common Factor (GCF) Worksheet
Practice finding the Greatest Common Factor (GCF) of two numbers with this Grade 4 math worksheet.
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Greatest Common Factor (GCF) Practice
Name:
Date:
Score:
Read each question carefully and find the greatest common factor (GCF) for the given numbers.
1. List all the factors of 12:
2. List all the factors of 18:
3. What is the GCF of 8 and 12?
2
4
8
12
4. The GCF of 10 and 15 is:
1
5
10
30
5. Find the GCF of 6 and 9. Show your work.
6. Find the GCF of 20 and 30. Show your work.
7. The GCF of two prime numbers is always 1.
True
False
8. The GCF of 7 and 14 is 7.
True
False
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