Addition and subtraction

  • 4 Dom
    problem
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    4 Dom

    Age
    5 to 11
    Challenge level
    3 out of 3

    Use these four dominoes to make a square that has the same number of dots on each side.

  • problem
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    Plants

    Age
    5 to 14
    Challenge level
    2 out of 3

    Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this?

  • Build it up
    problem
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    Build It Up

    Age
    7 to 11
    Challenge level
    1 out of 3

    Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.

  • Dicey Operations in Line
    game
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    Dicey Operations in Line

    Age
    7 to 11
    Challenge level
    1 out of 3

    In these addition, subtraction, multiplication and division games, you'll need to think strategically to get closest to the target.

  • Doplication
    problem
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    Doplication

    Age
    7 to 11
    Challenge level
    1 out of 3

    We can arrange dots in a similar way to the 5 on a dice and they usually sit quite well into a rectangular shape. How many altogether in this 3 by 5? What happens for other sizes?

  • Buying a Balloon
    problem
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    Buying a Balloon

    Age
    7 to 11
    Challenge level
    1 out of 3

    Lola bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lola have paid for the balloon?

  • Highest and Lowest
    problem
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    Highest and Lowest

    Age
    7 to 11
    Challenge level
    1 out of 3

    Put operations signs between the numbers 3, 4, 5 and 6 to make the highest possible number and lowest possible number.

  • Zios and Zepts
    problem
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    Zias and Zepts

    Age
    7 to 11
    Challenge level
    1 out of 3

    On the planet Vuv there are two sorts of creatures. The Zias have 3 legs and the Zepts have 7 legs. The great planetary explorer Nico counted 52 legs. How many Zias and how many Zepts were there?

  • problem
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    Abundant Numbers

    Age
    7 to 11
    Challenge level
    1 out of 3

    48 is called an abundant number because it is less than the sum of its factors (without itself). Can you find some more abundant numbers?

  • Super Shapes
    problem
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    Super Shapes

    Age
    7 to 11
    Challenge level
    1 out of 3

    The value of the circle changes in each of the following problems. Can you discover its value in each problem?