Given this information about averages, find the ages of these teachers.
The average temperature of six cities is 5$^\circ$C. What is the average temperature when two cities are added?
Two students collected some data on the wingspan of bats, but each lost a measurement. Can you find the missing information?
Grandpa made a super-heavy rock cake. Five people have guessed the weight of the cake. Can you work out the weight of his cake?
What is the probability that the next person you meet has an above average number of arms?
What do these statistics about family size mean?
Find the missing number if the mean, median and mode are all the same.
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?
Kyle and his teacher disagree about his test score - who is right?
