Averages

problem
Partial means

Age

14 to 16

Challenge level

From the mean of 64 numbers, and the mean of the first 36 of these numbers, can you work out the mean of the last 28 numbers?
problem
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?
problem
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?
problem
M, M and M

Age

11 to 14

Challenge level

If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?
problem
Rugby and ballet

Age

11 to 14

Challenge level

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

Age

14 to 16

Challenge level

How does Snow White need to change her result after the mix-up?
problem
Average surroundings

Age

14 to 16

Challenge level

Can you work out Ali's age based on the diagram?
problem
Stats statements

Age

16 to 18

Challenge level

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

Age

14 to 16

Challenge level

Find the missing number if the mean, median and mode are all the same.
problem
Match the matches

Age

7 to 11

Challenge level

Decide which charts and graphs represent the number of goals two football teams scored in fifteen matches.