Averages

  • A blue map of electronic connections between people.
    problem
    Favourite

    Connecting Averages

    Age
    11 to 16
    Challenge level

    The number in the square is the mean of the four numbers surrounding it. Can you find the missing numbers? 

  • Searching for mean(ing)
    problem
    Favourite

    Searching for Mean(ing)

    Age
    11 to 16
    Challenge level

    If you have a large supply of 3kg and 8kg weights, how many of each would you need for the average (mean) of the weights to be 6kg?

  • Wipeout
    problem
    Favourite

    Wipeout

    Age
    11 to 16
    Challenge level

    Can you do a little mathematical detective work to figure out which number has been wiped out?

  • For richer for poorer
    problem
    Favourite

    For Richer for Poorer

    Age
    14 to 16
    Challenge level

    Charlie has moved between countries and the average income of both has increased. How can this be so?

  • Stats statements
    problem
    Favourite

    Stats Statements

    Age
    16 to 18
    Challenge level

    Are these statistical statements sometimes, always or never true? Or it is impossible to say?

  • Small tomato seedlings in yellow pots.
    problem

    Kate's Date

    Age
    11 to 14
    Challenge level

    When Kate ate a giant date, the average weight of the dates decreased. What was the weight of the date that Kate ate?

  • Small tomato seedlings in yellow pots.
    problem

    Balancing the Books

    Age
    11 to 14
    Challenge level

    How many visitors does a tourist attraction need next week in order to break even?

  • Small tomato seedlings in yellow pots.
    problem

    Rugby and Ballet

    Age
    11 to 14
    Challenge level

    What is the average weight of five ballet dancers and ten rugby players?

  • Small tomato seedlings in pink pots.
    problem

    Better Spelling

    Age
    11 to 14
    Challenge level

    Weekly Problem 12 - 2010
    Can Emily increase her average test score to more than $80$%? Find out how many more tests she must take to do so.

  • Small pepper seedlings in orange pots.
    problem

    Seven Dwarfs

    Age
    11 to 14
    Challenge level

    The Seven Dwarfs have seven different birthdays. How old can they be?

Displaying 11 - 20 of 43