Free Quiz with Answers on Common Factors and HCF

Free QUIZ with Answers on Common Factors and Highest Common Factors (HCF), also named Greatest Common Factors (GCF), of Numbers

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Answer these questions and check your answer by clicking the Answer button.

1. The first step for finding the Highest Common Factor (HCF) of two or more numbers is to list all the _____________

a) factors of each number

b) multiples of each number

c) common factors of numbers

d) common multiples of numbers

2. Factors of 10: 1, 2, 5, 10

Factors of 15: 1, 3, 5, 15

Common Factors of 10 and 15 are 1 and 5.

a) True
b) False

3. List Common Factors of 12 and 28

4. Common Factors of 18: 1, 2, 3, 6, 9, 18

Common Factor of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36

What is the Highest Common Factor(HCF) of 18 and 36?

a) 2

b) 3

c) 9

d) 18

5. Factors of 6: 1, 2, 3, 6

Factors of 12: 1, 2, 3, 4, 6, 12

Factors of 20: 1, 2, 4, 5, 10, 20

The Highest Common Factor (HCF) of 6, 12 and 20 is ______.

a) 1

b) 2

c) 3

d) 4

6. Highest Common Factor (HCF) of 60 and 80 is _____.

a) 1

b) 3

c) 20

d) 60

7. Highest Common Factor (HCF) of 70 and 85 is _____.

a) 2

b) 5

c) 10

d) 15

8. What is the Highest Common Factor (HCF) of 18 and 72?

a) 2

b) 4

c) 18

d) 72

9. What is the Highest Common Factor (HCF) of 52 and 91 ?

10. What is the Highest Common Factor (HCF) of 84 and 144 ?

11. What is the Highest Common Factor (HCF) of 12, 32 and 40?

a) 2

b) 3

c) 4

d) 12

12. What is the Highest Common Factor (HCF) of 54, 72 and 90?

13. What is the Highest Common Factor (HCF) of 48, 56 and 72?

14. What is the Highest Common Factor (HCF) of 72, 96 and 120?

15. What is the Highest Common Factor (HCF) of 45, 90 and 135?

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