Cube folding practice: a method that works

Cube folding questions show a flat net of six faces and ask which folded cube it makes. They test spatial orientation, which air traffic control selection measures because controllers picture traffic in three dimensions all day. Most people find them hard at first and improve quickly with a method.

By Carl Grzegorzek, an international air traffic controller with more than 20 years' experience training and assessing controllers. Updated 25 October 2026.

The two rules that eliminate most wrong answers

1. Opposite faces never meet. In a straight line of the net, faces two squares apart end up on opposite sides of the cube. Any answer that shows two opposite faces side by side is wrong. Check this first: it usually rules out one or two options in seconds.
2. Neighbours stay neighbours. Faces that share an edge in the net share that edge on the cube. If a symbol points at a particular face in the net, it must still point at that face once folded.

The method: anchor and fold

1. Pick an anchor face that appears in the answer option, usually the one with the clearest symbol.
2. Fold one neighbour at a time. Don't try to fold the whole cube in your head. Ask only: which face is to the right of the anchor, and which is on top?
3. Check the orientation of any arrow or symbol against its neighbouring face.
4. Eliminate, then decide. Throw out options that break either rule, then check the survivors.

Common mistakes

• Trying to picture the entire cube at once, which is slow and error-prone.
• Ignoring the direction of symbols, which is where the trickiest wrong options hide.
• Rushing before the method is automatic. Accuracy first, then speed.

A two-week practice plan

Questions