Just Jottings: Age 11-14

This collection of tasks is part of the activities for 11-14 year olds section of the Maths at Home feature. All you need to get started is a pencil and paper! The stars represent the challenge level, with three stars indicating the most challenging activities. 

You may also wish to explore Just Jottings for 7-11 year olds, and Just Jottings for 14-16 year olds.

  • Substitution Cipher
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    Favourite

    Substitution Cipher

    Age
    11 to 14
    Challenge level

    Find the frequency distribution for ordinary English, and use it to help you crack the code.

  • Making a difference
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    Making a Difference

    Age
    11 to 14
    Challenge level

    How many different differences can you make?

  • Cryptarithms
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    Cryptarithms

    Age
    11 to 14
    Challenge level

    Can you crack these cryptarithms?

  • Peaches today, Peaches tomorrow...
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    Favourite

    Peaches Today, Peaches Tomorrow...

    Age
    11 to 14
    Challenge level

    A monkey with peaches, keeps a fraction of them each day, gives the rest away, and then eats one. How long can his peaches last?

  • Always a multiple?
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    Favourite

    Always a Multiple?

    Age
    11 to 14
    Challenge level

    Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...

  • Cuboids
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    Favourite

    Cuboids

    Age
    11 to 14
    Challenge level

    Can you find a cuboid that has a surface area of exactly 100 square units. Is there more than one? Can you find them all?

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