These Stage 4 and 5 problems haven't been solved yet. Can you be the first?
Can you solve the clues to find out who's who on the friendship graph?
Can you find a way to connect each house to the utilities without any pipes crossing?
How can you decide if a graph is traversable?
Can you find equations for cubic curves that have specific features?
Use some calculus clues to pin down an equation of a cubic graph.