Topic outline

  • Outcomes



    In this course you will learn about:

    1. The real number system.
    2. Natural numbers, whole numbers and integers.
    3. The highest common factor.
    4. The lowest common multiple.


  • Find the lowest common multiple

    A multiple or product is the result of multiplying numbers together. For example, \(8\times3\=24) so \(24\) is a multiple of \(8\) and \(3\). There are infinite multiples of any given number. [edit: the notation for the example is not pulling through correctly]

    Lowest common multiple (LCM)

    The lowest common multiple (LCM) is the smallest number that is a multiple of two or more numbers. 

    Multiples of \(3\) are {\(3; 6; 9; 12; 15; 18; 24; ...\)}

    Multiples of \(8\) are {\(8; 16; 24 ; 32; 40; 48; 56; ...\)}

    \(24\) is the lowest common number to both \(3\) and \(8\) so it is called the LCM of \(3\) and \(8\).

    You use LCMs when you add fractions and need to find the lowest common denominator so it is an important concept to master. Watch the next video for a detailed explanation of finding the LCM.