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Primary Live Problems and Recent Solutions

Each time you visit the NRICH site there are usually some activities which are 'live'. This means we are inviting students to send us solutions, and we will publish a selection of them, along with each student's name and their school, a few weeks later. If you'd like to know more about what we're looking for, read this short article.

The last day for sending solutions to the live problems is Friday 22 May.

Live problems

  • Dicey Operations
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    Favourite

    Dicey Operations

    Age
    7 to 14
    Challenge level
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    In these addition and subtraction games, you'll need to think strategically to get closest to the target.

  • Dicey Operations
    game
    Favourite

    More Dicey Operations

    Age
    7 to 14
    Challenge level
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    In these multiplication and division games, you'll need to think strategically to get closest to the target.

Recently solved problems

  • Five sticks of linked cubes of decreasing length, with the colours in rainbow order.
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    Favourite

    Making Sticks

    Age
    5 to 7
    Challenge level
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    Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?

  • problem
    Favourite

    Doughnut Percents

    Age
    7 to 14
    Challenge level
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    Can you make doughnuts by matching these fractions, decimals and percentages?

  • A yellow bag containing some threes.
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    Favourite

    Play to 37

    Age
    7 to 11
    Challenge level
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    In this game the winner is the first to make the total 37. Is this a fair game?