Explaining, convincing and proving

  • Magic Vs
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    Magic Vs

    Age
    7 to 11
    Challenge level
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    Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

  • Three Dice
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    Three Dice

    Age
    7 to 11
    Challenge level
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    Investigate the sum of the numbers on the top and bottom faces of a line of three dice. What do you notice?

  • Times Tables Shifts
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    Times Tables Shifts

    Age
    7 to 11
    Challenge level
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    In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?

  • How do you do it?
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    How Do You Do It?

    Age
    7 to 11
    Challenge level
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    This group activity will encourage you to share calculation strategies and to think about which strategy might be the most efficient.

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    The Car That Passes

    Age
    7 to 11
    Challenge level
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    What statements can you make about the car that passes the school gates at 11am on Monday? How will you come up with statements and test your ideas?

  • Journeys in Numberland
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    Journeys in Numberland

    Age
    7 to 11
    Challenge level
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    Tom and Ben visited Numberland. Use the maps to work out the number of points each of their routes scores.

  • Bryony's Triangle
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    Bryony's Triangle

    Age
    7 to 11
    Challenge level
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    Watch the video to see how to fold a square of paper to create a flower. What fraction of the piece of paper is the small triangle?

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    The Domesday Project

    Age
    7 to 11
    Challenge level
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    Take a look at these data collected by children in 1986 as part of the Domesday Project. What do they tell you? What do you think about the way they are presented?

  • Going for Gold
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    Going for Gold

    Age
    7 to 11
    Challenge level
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    Looking at the Olympic Medal table, can you see how the data is organised? Could the results be presented differently to give another nation the top place?

  • Round a hexagon
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    Round a Hexagon

    Age
    7 to 11
    Challenge level
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    This problem shows that the external angles of an irregular hexagon add to a circle.