Highest Common Factor KS3 MCQs

The highest common factor (HCF) is found by finding all common factors of two numbers and selecting the

• largest one
• smallest one
• middle one

Calculate the HCF of 30 and 18

• 6
• 2
• 3

Calculate the HCF of 40 and 24

• 8
• 2
• 4

Calculate the HCF of 15 and 35

• 5
• 3
• 7

Calculate the HCF of 14 and 25

• 1
• 5
• 7

Calculate the HCF of 108 and 144

• 36
• 24
• 12

Calculate the HCF of 18, 54 and 60

• 9
• 18
• 15

Calculate the HCF of 42 and 90

• 6
• 8
• 12

Calculate the HCF of 72 and 80

• 9
• 8
• 10

Calculate the HCF of 70 and 280

• 70
• 10
• 35