Everyday

The Traversed Strip

Level 3 · Hard

A worker joins the ends of a strip after turning one by half a turn. He draws along its centre without lifting the pen. On returning to the starting point he has marked what, before joining, were both faces. He has not crossed an edge.

1. Choose a narrator: they read the answer privately and hide it.
2. Read the premise aloud. Answers: yes, no or irrelevant.
3. When the game ends, mark the puzzle as played.