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All about averages

How well do you really understand mean, median and mode?

In these puzzling problems we invite you to be playful with numbers and discover how averages change when data sets are tweaked.

About Average link

About Average live

Stage: 3 Challenge Level: Challenge Level:1

Can you find sets of numbers which satisfy each of our mean, median, mode and range conditions?

Unequal Averages link

Unequal Averages live

Stage: 3 and 4 Challenge Level: Challenge Level:1

Play around with sets of five numbers and see what you can discover about different types of average...

Wipeout link

Wipeout live

Stage: 3 and 4 Challenge Level: Challenge Level:2 Challenge Level:2

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

The Lives of Presidents link

The Lives of Presidents live

Stage: 3 and 4 Challenge Level: Challenge Level:1

Do Presidents of the USA live longer now than in the past?