Question

Answer these questions and show working out.
(extra points for all)

Answer 1

See below

Explanation:

We can find the Highest Common Factor (HCF) by the prime factorization of the terms.

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a) 4 and 5

⇒ 4 = 4 x 1

⇒ 5 = 5 x 1

⇒ HCF (4, 5) = 1

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b) 8 and 13

⇒ 8 = 2 x 2 x 2 x 1

⇒ 13 = 13 x 1

⇒ HCF (8, 13) = 1

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i) 80 and 120

⇒ 80 = 40 x 2

⇒ 120 = 40 x 3

⇒ HCF (80, 120) = 40