When to use - HCF & LCM?

We learn how to find the Highest Common Factor (HCF) and the Lowest Common Multiple (LCM); however, they are meaningless unless we know when these are useful and can be applied in real world situation.

The following questions are from your workbook.
Read each of the question carefully. Decide which technique to apply to solve the problem.

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    Question 20

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    Question 21

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    Question 22

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    Question 23

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    Question 24

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    Question 25

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    Question 26

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    How do you decide...

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