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Index Notation

100

5 x 5

5²

200

17 x 17 x 17

17³

300

2 x 2 x 7 x 7

2² x 7²

Prime factorisation

100

Factorise 42 and express it as a product of prime factors.

2 x 3 x 7

200

Factorise 216 and express it as a product of prime factors.

2² x 79

300

Factorise 425 and express it as a product of prime factors.

5² x 17

400

Factorise 648 and express it as a product of prime factors.

2³ x 3⁴

LCM

100

Find the LCM of 12, 18

2² x 3² = 36

200

Find the LCM of 78, 56.

2³ x 3 x 7 x 13 = 2,184

300

Find the LCM of 18,24

2³ x 3² = 72

400

Find the LCM of 225, 105

3² x 5² x 7 = 1,575

HCF

100

Find the GCF of 12, 42

2 x 3 = 6

200

Find the GCF of 15, 63 

3

300

Find the GCF of 96, 36.

2² x 3 = 12

400

Find the GCF of 108, 48.

2² x 3 = 12