Equally likely outcomes

  • Flippin' discs
    problem
    Favourite

    Flippin' Discs

    Age
    11 to 14
    Challenge level

    Discs are flipped in the air. You win if all the faces show the same colour. What is the probability of winning?

  • Two's company
    problem
    Favourite

    Two's Company

    Age
    11 to 14
    Challenge level

    Seven balls are shaken. You win if the two blue balls end up touching. What is the probability of winning?

  • Cosy corner
    problem
    Favourite

    Cosy Corner

    Age
    11 to 14
    Challenge level

    Six balls are shaken. You win if at least one red ball ends in a corner. What is the probability of winning?

  • A Connect Four game with red and yellow counters placed.
    problem
    Favourite

    Connect Three

    Age
    11 to 16
    Challenge level

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

  • Which spinners?
    problem
    Favourite

    Which Spinners?

    Age
    14 to 18
    Challenge level

    Can you work out which spinners were used to generate the frequency charts?

  • Teams
    problem
    Favourite

    Teams

    Age
    16 to 18
    Challenge level

    Two brothers belong to a club with 10 members. Four are selected for a match. Find the probability that both brothers are selected.

  • Can't find a coin?
    problem

    Can't Find a Coin?

    Age
    11 to 14
    Challenge level
    Can you generate a set of random results? Can you fool the random simulator?
  • A Brief History of Probability
    problem

    A Brief History of Probability

    Age
    11 to 14
    Challenge level

    Can you help d'Alembert discover the probabilty of at least one head in two coin flips?

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