Amazing Rooms

Trace a path through a house only using each door once

How it works

Starting outside the house use the rope to trace a path through the house that goes through every door once.

Things to Try or ask around the exhibit

  • Can you trace a path that ends inside the house?
  • Can you trace a path that ends outside the house?


In mathematics there are paths you can define called Euler paths and Euler Circuits. Euler paths don’t need to begin and end at the same point while Euler circuits do. Because the house has an odd number of doors only a Euler Path is possible to trace with the rope.

Finding the science in your world

Euler path rules can be used to solve problems like reconstructing ancient DNA sequences and building electrical circuits.