Working systematically

  • Nine-Pin Triangles
    problem
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    Nine-Pin Triangles

    Age
    7 to 11
    Challenge level
    1 out of 3

    How many different triangles can you make on a circular pegboard that has nine pegs?

  • Brush Loads
    problem
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    Brush Loads

    Age
    7 to 11
    Challenge level
    1 out of 3

    How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Try with other numbers of cubes as well.

  • Torn Shapes
    problem
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    Torn Shapes

    Age
    7 to 11
    Challenge level
    1 out of 3

    These rectangles have been torn. How many squares did each one have inside it before it was ripped?

  • Coordinate Challenge
    problem
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    Coordinate Challenge

    Age
    7 to 11
    Challenge level
    1 out of 3

    Use the clues about the symmetrical properties of these letters to place them on the grid.

  • What's in the Box?
    problem
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    What's in the Box?

    Age
    7 to 11
    Challenge level
    1 out of 3

    This big box multiplies anything that goes inside it by the same number. If you know the numbers that come out, what multiplication might be going on in the box?

  • Shape Times Shape
    problem
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    Shape Times Shape

    Age
    7 to 11
    Challenge level
    1 out of 3

    These eleven shapes each stand for a different number. Can you use the number sentences to work out what they are?

  • A wooden noughts and crosses game, with three crosses in a diagonal row.
    problem
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    First Connect Three

    Age
    7 to 11
    Challenge level
    1 out of 3

    Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

  • Magic Vs
    problem
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    Magic Vs

    Age
    7 to 11
    Challenge level
    1 out of 3

    Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

  • Bryony's Triangle
    problem
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    Bryony's Triangle

    Age
    7 to 11
    Challenge level
    1 out of 3

    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?

  • problem
    Favourite

    Fifteen Cards

    Age
    7 to 11
    Challenge level
    1 out of 3

    Can you use the information to find out which cards I have used?