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.


Solve the follow questions

  1. Find the HCF for 24 & 18.
  2. Find the LCM for 6 & 9.


  1. 6
  2. 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.

About the Math Tutor - Dr Loo

I am a PhD holder with 9 years of teaching experience at secondary school and university. My expertizes are mathematics, statistics, econometrics, finance and machine learning.

Currently I do provide consultation and private tuition in Singapore. For those who are looking for math tutor in Singapore or statistics tutor in Singapore, please feel free to contact me at +65-85483705 (SMS/Whatsapp/Telegram).

Some of the math tuition in Singapore I provide includes O-level math tuition and also JC Math Tuition (H1 Math Tuition & H2 Math Tuition). On the other hand, my statistics tuition in Singapore mostly focus on pre-university level until postgraduate level. For those who prefer online tutoring service, the online O-level math tuition and online JC math tuition are also available.

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