Prime numbers

  • Prompt Cards
    problem

    Prompt cards

    Age
    7 to 11
    Challenge level
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    These two group activities use mathematical reasoning - one is numerical, one geometric.

  • Tom's Number
    problem

    Tom's number

    Age
    7 to 11
    Challenge level
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    Work out Tom's number from the answers he gives his friend. He will only answer 'yes' or 'no'.
  • A Conversation Piece
    problem

    A conversation piece

    Age
    7 to 11
    Challenge level
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    Take the number 6 469 693 230 and divide it by the first ten prime numbers and you'll find the most beautiful, most magic of all numbers. What is it?
  • problem

    Round and round the circle

    Age
    7 to 11
    Challenge level
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    What happens if you join every second point on this circle? How about every third point? Try with different steps and see if you can predict what will happen.

  • problem

    Two primes make one square

    Age
    7 to 11
    Challenge level
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    Can you make square numbers by adding two prime numbers together?

  • Penta Primes
    problem

    Penta primes

    Age
    7 to 11
    Challenge level
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    Using all ten cards from 0 to 9, rearrange them to make five prime numbers. Can you find any other ways of doing it?
  • Four playing cards on top of each other. Each card shows a different ace.
    problem

    Statement snap

    Age
    7 to 14
    Challenge level
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    You'll need to know your number properties to win a game of Statement Snap...

  • problem

    Factor lines

    Age
    7 to 14
    Challenge level
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    Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.

  • Factors and Multiples Game
    game
    Favourite

    Factors and multiples game

    Age
    7 to 16
    Challenge level
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    A game in which players take it in turns to choose a number. Can you block your opponent?