Visualising and representing

  • Isometric Areas
    problem
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    Isometric Areas

    Age
    11 to 14
    Challenge level
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    We usually use squares to measure area, but what if we use triangles instead?

  • Calendar Capers
    problem

    Calendar Capers

    Age
    11 to 14
    Challenge level
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    Choose any three by three square of dates on a calendar page...
  • Days and Dates
    problem
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    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...

  • A black goat with horns and white facial markings.
    problem

    The Old Goats

    Age
    11 to 14
    Challenge level
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    A rectangular field has two posts with a ring on top of each post. There are two quarrelsome goats and plenty of ropes which you can tie to their collars. How can you secure them so they can't fight each other but can reach every corner of the field?

  • Euromaths
    problem

    Euromaths

    Age
    11 to 14
    Challenge level
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    How many ways can you write the word EUROMATHS by starting at the top left hand corner and taking the next letter by stepping one step down or one step to the right in a 5×5 array?

  • Blue and White
    problem
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    Blue and White

    Age
    11 to 14
    Challenge level
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    Identical squares of side one unit contain some circles shaded blue. In which of the four examples is the shaded area greatest?

  • Icosian Game
    problem

    Icosian Game

    Age
    11 to 14
    Challenge level
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    This problem is about investigating whether it is possible to start at one vertex of a platonic solid and visit every other vertex once only returning to the vertex you started at.

  • Coloured Edges
    problem

    Coloured Edges

    Age
    11 to 14
    Challenge level
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    The whole set of tiles is used to make a square. This has a green and blue border. There are no green or blue tiles anywhere in the square except on this border. How many tiles are there in the set?
  • A green frog.
    problem
    Favourite

    Frogs

    Age
    11 to 14
    Challenge level
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    How many moves does it take to swap over some red and blue frogs? Do you have a method?

  • Reflecting Squarely
    problem
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    Reflecting Squarely

    Age
    11 to 14
    Challenge level
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    In how many ways can you fit all three pieces together to make shapes with line symmetry?