Graphs
Graph theory, algorithms on graphs, trees, and network analysis.
Kasuti
Trace traditional Kasuti embroidery motifs so the design appears identical on both sides — an alternating Eulerian tour puzzle on a grid.
graph-theory eulerian-tour embroidery
Neighbor Sum Avoidance
Arrange numbers in a circle so that the sum of two neighbors is never divisible by 3, 5, or 7. An interactive graph theory puzzle!
graph-theory puzzle arrangement