Exploring and noticing

  • Folium of Descartes
    problem

    Folium of Descartes

    Age
    16 to 18
    Challenge level
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    Investigate the family of graphs given by the equation x^3+y^3=3axy for different values of the constant a.

  • Have you got it?
    problem

    Have you got it?

    Age
    11 to 14
    Challenge level
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    Can you explain the strategy for winning this game with any target?

  • Making Waves
    problem

    Making waves

    Age
    16 to 18
    Challenge level
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    Which is larger cos(sin x) or sin(cos x) ? Does this depend on x ?

  • Climbing Powers
    problem

    Climbing powers

    Age
    16 to 18
    Challenge level
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    Does it make any difference how we write powers of powers? 

  • Bendy Quad
    problem

    Bendy quad

    Age
    14 to 16
    Challenge level
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    Four rods are hinged at their ends to form a convex quadrilateral. Investigate the different shapes that the quadrilateral can take. Be patient this problem may be slow to load.

  • Days and Dates
    problem

    Days and dates

    Age
    11 to 14
    Challenge level
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    Investigate how you can work out what day of the week your birthday will be on next year, and the year after...

  • Ladder and Cube
    problem

    Ladder and cube

    Age
    14 to 16
    Challenge level
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    A 1 metre cube has one face on the ground and one face against a wall. A 4 metre ladder leans against the wall and just touches the cube. How high is the top of the ladder above the ground?

  • problem

    Birthday cakes

    Age
    5 to 7
    Challenge level
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    Jack's mum bought some candles to use on his birthday cakes and when his sister was born, she used them on her cakes too. Can you use the information to find out when Kate was born?

  • Domino Join Up
    problem

    Domino join up

    Age
    5 to 7
    Challenge level
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    Can you arrange fifteen dominoes so that all the touching domino pieces add to 6 and the ends join up? Can you make all the joins add to 7?
  • Domino Sequences
    problem

    Domino sequences

    Age
    5 to 7
    Challenge level
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    Find the next two dominoes in these sequences.