Difficulty
Basic nets only (3 shapes with four squares in a row, like the cross). Get used to folding nets in your head.
Press "Start" and a cube net appears. Find the face opposite the colored one by tapping one of three choices. 10 questions in all.
Cube Net is a spatial reasoning drill where you look at a cube's net (an unfolded flat pattern of six squares) and identify which face is opposite a highlighted one. The net is drawn in SVG on screen, one face is colored, and you pick the opposite face from three choices.
A cube has exactly 11 distinct nets — from the familiar cross shape to staircase and zigzag forms — and this drill includes all of them. The ability to mentally fold a flat pattern into a 3D shape is a core spatial skill that comes up in school geometry, map reading, packaging design, and many everyday situations.
Three levels let you build spatial reasoning step by step.
A cube net is made of six squares joined edge to edge and laid flat. Counting rotations and reflections as the same, there are exactly 11 distinct nets: 6 with four squares in a row and one square above and below, 3 that split into rows of 2, 3 and 1, one 2-2-2 staircase, and one 3-3 shape. This drill stores all 11 as 2D grid coordinates and uses BFS (breadth-first search) to simulate folding, automatically computing which face ends up opposite which.
On a standard die, opposite faces always sum to 7 (1 & 6, 2 & 5, 3 & 4). The hard level numbers the faces by this rule but deliberately shows only two of the numbers, so you cannot tell which one sits across from the "?" without folding the net in your head.
Cube Net draws the net, checks your answers and plays its sound effects inside your browser. Nets are drawn with SVG and sounds are synthesized on the fly with Web Audio, so no image or audio files are used. The only thing saved is your best score per difficulty, stored in your device's localStorage. Your answers and scores are not sent to a server.