This is part of our Secondary Curriculum collection of favourite rich tasks arranged by topic.
Scroll down to see the complete collection, or explore our subcollections on Perimeter and Area in two dimensions, and Surface Area and Volume in three dimensions.

problem
Olympic triathlon
Is it the fastest swimmer, the fastest runner or the fastest cyclist who wins the Olympic Triathlon?

problem
Picturing the world
How can we make sense of national and global statistics involving very large numbers?

problem
Perception versus reality
Infographics are a powerful way of communicating statistical information. Can you come up with your own?


problem
For richer for poorer
Charlie has moved between countries and the average income of both has increased. How can this be so?

problem
Which list is which?
Six samples were taken from two distributions but they got muddled up. Can you work out which list is which?
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You may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.