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Euler's Squares
Euler found four whole numbers such that the sum of any two of the numbers is a perfect square...
Odd Differences
The diagram illustrates the formula: 1 + 3 + 5 + ... + (2n - 1) = n² Use the diagram to show that any odd number is the difference of two squares.
Tree Tops
Can you make sense of information about trees in order to maximise the profits of a forestry company?
Age 14 to 16
Challenge Level
Why not use a spreadsheet to calculate quickly the score for each event given the athlete's times or distances?
Then try tweaking her times and distances to see how her scores can be affected by different training schedules.
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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.