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HCF and LCM

KS3 Maths Foundation Questions -HCF and LCM

1) Find the Lowest Common Multiple (LCM) of:

a) 7 and 9 =

b) 16 and 24 =

c) 18 and 30 =

d) 15 and 55 =

e) 27 and 36 =

f) 5, 8 and 16 =

g) 4, 5 and 9 =

2) Multiply the LCM of 4 and 6 by the LCM of 12 and 18:

3) What is the highest Common Factor(HCF) of:

a) 60 and 72 =

b) 120 and 80 =

c) 40 and 108 =

d) 16 and 24 =

e) 124 and 56 =

f) 9, 12 and 24 =

g) 14, 21 and 49 =

4) Multiply the HCF of 4 and 9 by the HCF of 3 and 4:

KS3 Maths Higher Questions – HCF and LCM

1) Find the Lowest Common Multiple (LCM) of:

a) 7 and 9 =

b) 16 and 24 =

c) 18 and 30 =

d) 5, 8 and 16 =

e) 4, 5 and 9 =

2) Multiply the LCM of 4, 6 and 12 by the LCM of 15, 18 and 21:

3) What is the highest Common Factor(HCF) of:

a) 60 and 72 =

b) 120 and 80 =

c) 124 and 56 =

d) 9, 12 and 24 =

e) 14, 21 and 49 =

4) Multiply the HCF of 4, 9 and 21 by the HCF of 4, 28 and 64:

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