LCM and HCF

A common factor of two integers is always a ____________ of their HCF.

• multiple

• factor

• (no answer)

What is the LCM of 6 and 8 ?

• 12

• 18

• 24

• 36

Find the HCF of 30 and 36

• 2

• 3

• 4

• 6

The Lowest Common Multiple (LCM) of 24 and 60 is:

• 90

• 120

• 30

• 10

Find the HCF of 12 and 15 ?

• 2

• 2 x 3

• 3

• 60

Find the HCF of 40 and 60?

• 10

• 20

• 30

• None of the above

What is the LCM of 4 and 12? 

• 4

• 8

• 12

• 16

Derek advises a patient to have a scale every 4 months and a polish every 6 months. If they have a scale and polish today, how long will they wait before they can have both during the same appointment?

• HCF

• LCM

Find the HCF of 25 and 35

• 10

• 5

• 7

• 1

Find the LCM of 30, 36 and 48

(a)