Gibraltar Geometrylive
Age 11 to 14 Challenge Level:
Take a look at the photos of tiles at a school in Gibraltar. What questions can you ask about them?
Pocket Moneylive
Age 11 to 14 Challenge Level:
Which of these pocket money systems would you rather have?
Same Answerlive
Age 11 to 14 Challenge Level:
Aisha's division and subtraction calculations both gave the same answer! Can you find some more examples?
Farey Sequenceslive
Age 11 to 14 Challenge Level:
There are lots of ideas to explore in these sequences of ordered fractions.
Mediant Madnesslive
Age 14 to 16 Challenge Level:
Kyle and his teacher disagree about his test score - who is right?
Farey Neighbourslive
Age 16 to 18 Challenge Level:
Farey sequences are lists of fractions in ascending order of magnitude. Can you prove that in every Farey sequence there is a special relationship between Farey neighbours?
Ford Circleslive
Age 16 to 18 Challenge Level:
Can you find the link between these beautiful circle patterns and Farey Sequences?
Secondary Toughnutslive
Age 11 to 18 Challenge Level:
These secondary problems have not yet been solved. Can you be the first?
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.