4 is the highest common factor (HCF) of each of the following except A 4 dan/and 12 B 8 dan/and 28 C 4, 16 dan/and 36 D 20,80 dan/and 120

asked Jul 6, 2021 162k views

1 vote

4 is the highest common factor (HCF) of each

of the following except
A 4 dan/and 12
B 8 dan/and 28
C 4, 16 dan/and 36
D 20,80 dan/and 120

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2 votes

Answer:

D 20,80 dan/and 120

Explanation:

$20 = {2}^(2) * 5 \\ 80 = {2}^(4) * 5 \\ 120 = {2}^(3) * 3 * 5 \\ common \: factors = {2}^(2) \: and \: 5 \\ hcf = {2}^(2) * 5 = 20$

Bill Zelenko answered Jul 10, 2021

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