Converging Quadrilaterals
Age 16 to 18
Challenge Level
Explore the properties of this iterative geometrical procedure
A Rational Search
Age 16 to 18
Challenge Level
Investigate constructible images which contain rational areas.
Few and Far Between?
Age 16 to 18
Challenge Level
Can you find some Pythagorean Triples where the two smaller numbers differ by 1?
The Best Square
Age 16 to 18
Challenge Level
How would you judge a competition to draw a freehand square?
Chance of That
Age 16 to 18
Challenge Level
What's the chance of a pair of lists of numbers having sample correlation exactly equal to zero?
A Different Differential Equation
Age 16 to 18
Challenge Level
Explore the properties of this different sort of differential equation.
Trig-trig
Age 16 to 18
Challenge Level
Explore the properties of combinations of trig functions in this open investigation.
Investigating Twilgo
Age 16 to 18
Challenge Level
What can you create using 140 characters and our cool Twilgo environment?
Factors and Multiples Graphs
Age 16 to 18
Challenge Level
Explore creating 'factors and multiples' graphs such that no lines joining the numbers cross
Copyright © 1997 - 2023. University of Cambridge.
All rights reserved.
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.