problem
Favourite
Efficient cutting
Use a single sheet of A4 paper and make a cylinder having the greatest possible volume. The cylinder must be closed off by a circle at each end.
problem
Favourite
Gutter
Manufacturers need to minimise the amount of material used to make
their product. What is the best cross-section for a gutter?
problem
Favourite
Fill Me Up Too
In Fill Me Up we invited you to sketch graphs as vessels are filled with water. Can you work out the equations of the graphs?