Can you make matrices which will fix one lucky vector and crush another to zero?
This challenge involves eight three-cube models made from interlocking cubes. Investigate different ways of putting the models together then compare your constructions.
My local DIY shop calculates the price of its windows according to the area of glass and the length of frame used. Can you work out how they arrived at these prices?
How well can you estimate 10 seconds? Investigate with our timing tool.
Can you prove that triangles are right-angled when $a^2+b^2=c^2$?
Jack's mum bought some candles to use on his birthday cakes and when his sister was born, she used them on her cakes too. Can you use the information to find out when Kate was born?
