Mental calculations

  • Find the Difference
    problem
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    Find the Difference

    Age
    5 to 7
    Challenge level

    Place numbers in the circles so that each number is the difference between the two numbers below it.

  • 2, 4, 6, 8
    problem
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    2, 4, 6, 8

    Age
    5 to 7
    Challenge level

    Using the cards 2, 4, 6, 8, +, - and =, what number statements can you make?

  • problem
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    The Brown Family

    Age
    5 to 7
    Challenge level

    Use the information about Sally and her brother to find out how many children there are in the Brown family.

  • I'm Eight
    problem
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    I'm Eight

    Age
    5 to 11
    Challenge level

    Find a great variety of ways of asking questions which make 8.

  • Magnifying glass
    problem
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    Number Detective

    Age
    5 to 11
    Challenge level

    Follow the clues to find the mystery number.

  • Strike it out
    problem
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    Strike It Out

    Age
    5 to 11
    Challenge level

    This game involves addition and subtraction skills combined with some strategic thinking.

  • Ordering cards
    problem
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    Ordering Cards

    Age
    5 to 11
    Challenge level

    This problem is designed to help children to learn, and to use, the two and three times tables.

  • Buying a Balloon
    problem
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    Buying a Balloon

    Age
    7 to 11
    Challenge level

    Lola bought a balloon at the circus using six coins. 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

    Put operations signs between the numbers 3, 4, 5 and 6. What answers can you make?

  • Super Shapes
    problem
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    Super Shapes

    Age
    7 to 11
    Challenge level

    Can you discover the value of the circle in each problem?

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