Unit 1: Primes, HCF & LCM

Find Highest Common Factor (HCF) and Lowest Common Multiple (LCM)

The following clip shows how we can find HCF and LCM using the division method and the index notation method.

Both methods give the same answer, except that the index notation is deemed to be more efficient, as you could find both HCF and LCM using the same set of working (without the need to carry out division of the numbers one more time). It is also less prone to error that could happen in the division method, in particular, for LCM.



The following demonstrates how to find HCF and LCM using index notation method



Assignment 1.2 - suggested solution to selected questions

Below is the playlist to short clips explaining how to solve Q2, Q3, Q4, Q5 and Q6



Click at the links below to view the individual clips:








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