Time

  • A Brief History of Time Measurement
    article

    A brief history of time measurement

    Noticing the regular movement of the Sun and the stars has led to a desire to measure time. This article for teachers and learners looks at the history of humanity's need to measure things.
  • Making Maths: Make a Pendulum
    page

    Making maths: make a pendulum

    Galileo, a famous inventor who lived about 400 years ago, came up with an idea similar to this for making a time measuring instrument. Can you turn your pendulum into an accurate minute timer?
  • Time and Tide
    page

    Time and tide

    What can you say about when these pictures were taken?
  • Flying Down Under
    problem

    Flying down under

    Age
    11 to 14
    Challenge level
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    Fred flew to Melbourne, Australia. What time was it in Melbourne when Fred's flight arrived?
  • Rule of Three
    problem

    Rule of three

    Age
    11 to 14
    Challenge level
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    If it takes four men one day to build a wall, how long does it take 60,000 men to build a similar wall?
  • Digital Times
    problem

    Digital times

    Age
    11 to 14
    Challenge level
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    Which segment on a digital clock is lit most each day? Which segment is lit least? Does it make any difference if it is set to 12 hours or 24 hours?
  • In Constantly Passing
    problem

    In constantly passing

    Age
    14 to 16
    Challenge level
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    A car is travelling along a dual carriageway at constant speed. Every 3 minutes a bus passes going in the opposite direction, while every 6 minutes a bus passes the car travelling in the same direction. Buses leave the depot at regular intervals; they travel along the dual carriageway and back to the depot at a constant speed. At what interval do the buses leave the depot?
  • Circuit training
    problem

    Circuit training

    Age
    14 to 16
    Challenge level
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    Mike and Monisha meet at the race track, which is 400m round. Just to make a point, Mike runs anticlockwise whilst Monisha runs clockwise. Where will they meet on their way around and will they ever meet at the start again? If so, after how many circuits?
  • Three of a Kind
    problem

    Three of a kind

    Age
    11 to 14
    Challenge level
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    How long is it between 5:55 and the next time all three digits on a digital clock are the same?
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