Algorithms

  • Placeholder: several colourful numbers
    problem

    Vital?

    Age
    16 to 18
    Challenge level
    Third challenge cipher
  • Placeholder: several colourful numbers
    problem

    Semicircle

    Age
    16 to 18
    Challenge level
    Fourth challenge cipher
  • Placeholder: several colourful numbers
    problem

    Up a Semitone?

    Age
    16 to 18
    Challenge level
    Fifth challenge cipher
  • Placeholder: several colourful numbers
    problem

    Ip?

    Age
    16 to 18
    Challenge level
    Seventh challenge cipher
  • Placeholder: several colourful numbers
    problem

    A Fine Thing?

    Age
    16 to 18
    Challenge level
    Second challenge cipher
  • Medal Muddle
    problem

    Medal Muddle

    Age
    11 to 14
    Challenge level
    Countries from across the world competed in a sports tournament. Can you devise an efficient strategy to work out the order in which they finished?
  • Tis Unique
    problem

    Tis Unique

    Age
    11 to 14
    Challenge level

    This addition sum uses all ten digits 0, 1, 2...9 exactly once. Find the sum and show that the one you give is the only possibility.

  • Plastic human skeleton on a blue background.
    problem

    Skeleton

    Age
    11 to 14
    Challenge level

    Can you reconstruct the long division calculation from the 'skeleton'?

  • Zeller's Birthday
    problem

    Zeller's Birthday

    Age
    14 to 16
    Challenge level

    What day of the week were you born on? Do you know? Here's a way to find out.

  • Peaches in General
    problem

    Peaches in General

    Age
    14 to 16
    Challenge level

    It's like 'Peaches Today, Peaches Tomorrow' but interestingly generalized.

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