Greatest Common Divisor Worksheet
Practice finding the greatest common divisor (GCD) of two numbers with this Grade 4 math worksheet.
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Greatest Common Divisor
Name:
Date:
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Read each question carefully and follow the instructions to find the Greatest Common Divisor (GCD).
1. List all the factors of 12:
2. List all the factors of 18:
3. Using your lists from questions 1 and 2, what are the common factors of 12 and 18?
4. What is the Greatest Common Divisor (GCD) of 12 and 18?
2
3
6
12
5. Find the GCD of 10 and 15:
6. Find the GCD of 20 and 30:
7. Find the GCD of 9 and 27:
8. The GCD of two prime numbers is always 1.
True
False
9. The GCD of 7 and 14 is 7.
True
False
10. Sarah has 24 apples and 36 oranges. She wants to divide them into baskets so that each basket has the same number of apples and the same number of oranges. What is the greatest number of baskets she can make?
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