Filter by: Content type: ALL Problems Articles Games Stage: All Stage 1&2 Stage 2&3 Stage 3&4 Stage 4&5 Challenge level:
Discover a handy way to describe reorderings and solve our anagram in the process.
An introduction to the sort of algebra studied at university, focussing on groups.
An environment for exploring the properties of small groups.
Learn about the rules for a group and the different groups of 4 elements by doing some simple puzzles.