Algebra GCF and HCF

What is the Highest Common Factor (HCF) of the number pair 5 and 20?

• 4

• 5

• 10

• 20

What is the Highest Common Factor (HCF) of the number pair 24 and 18?

• 2

• 3

• 6

• 9

What is the Highest Common Factor (HCF) of the number pair 8 and 20?

• 2

• 4

• 5

• 10

What is the Highest Common Factor (HCF) of the number pair 6 and 15?

• 1

• 2

• 3

• 6

What is the Highest Common Factor (HCF) of the number pair 6 and 9?

• 1

• 2

• 3

• 6

Find the highest common factor (HCF) of 24 and 36.

• 18

• 6

• 30

• 12

HCF (30, 45)

HCF (28, 35)

What is the Highest Common Factor (HCF) of the number pair 8 and 12?

• 2

• 3

• 4

• 6

Find the greatest common divisor.

• 1

• 2x

• 4

• 4x