Being collaborative

  • Stop the Clock
    problem

    Stop the clock

    Age
    5 to 7
    Challenge level
    filled star filled star filled star

    This is a game for two players. Can you find out how to be the first to get to 12 o'clock?

  • Reaction timer
    problem

    Reaction timer

    Age
    11 to 14
    Challenge level
    filled star empty star empty star
    This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.
  • All in a jumble
    problem

    All in a jumble

    Age
    11 to 14
    Challenge level
    filled star filled star empty star
    My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.
  • First Connect Three
    problem

    First connect three

    Age
    7 to 11
    Challenge level
    filled star empty star empty star
    Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?
  • Connect Three
    problem

    Connect three

    Age
    11 to 16
    Challenge level
    filled star filled star empty star

    In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?

  • Overlaps
    problem

    Overlaps

    Age
    5 to 7
    Challenge level
    filled star filled star empty star

    What does the overlap of these two shapes look like? Try picturing it in your head and then use some cut-out shapes to test your prediction.

  • Shape Times Shape
    problem

    Shape times shape

    Age
    7 to 11
    Challenge level
    filled star empty star empty star

    These eleven shapes each stand for a different number. Can you use the number sentences to work out what they are?

  • Secret Number
    problem

    Secret number

    Age
    5 to 7
    Challenge level
    filled star filled star empty star

    Annie and Ben are playing a game with a calculator. What was Annie's secret number?