# High Common Factor (HCF) & Lowest Common Multiple (LCM)

- HCF is the highest common factor between the numbers.
- LCM is the lowest common multiple between the numbers.

These topics are related to prime factorisation when they learn numbers and their operations in secondary math classes.

**Question**

Solve the follow questions

- Find the HCF for 24 & 18.
- Find the LCM for 6 & 9.

**Answer**

*6**18*

### Having difficulty in understanding the LCM & HCF?

The LCM and HCF is one of the important fundamental topics to be learnt in most of the secondary school math syllabus, you are encourage to look for your secondary math teacher to clarify about this topic if you have problems in understanding it. Alternatively, you can find a suitable secondary math tuition class for yourself.

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