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Real life applications for HCF and LCM?

Discussion in 'Mathematics' started by kevex1, May 19, 2009.

  1. Does anyone know any real life applications for HCF and LCM. I can think of sorts of questions for example if one light house flashes with 8 second period and one with 12 second period, how often will they both flash simultaneously. This sort of question is contrived. Any real ones?
    All ideas gratefully received.

  2. frustum

    frustum Lead commenter

    You could try following the topic with adding fractions, where LCM comes in very handy, and which is a bit more obviously applicable.
  3. maths126

    maths126 New commenter

    How about the alignment of planets around the Sun?
  4. Different sized cogs in a machine?
  5. bombaysapphire

    bombaysapphire Star commenter

    Wanting to use the same group sizes for an activity with 2 different sized classes for HCF.
  6. bombaysapphire

    bombaysapphire Star commenter

    Less real life but can be fun. For LCM - who will first say Fizz Buzz in different games of Fizz Buzz.

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