Logic Puzzles Online
Free puzzles to play in your browser, with new ones every day. Wednesday, September 30, 2026.
Train Tracks
Lay one railway from A to B. The numbers count the track squares in each row and column.
3D spatial reasoning
Match top, front and side views to 3D cube solids. Five questions a day, plus unlimited practice.
More 3D practice
- 3D puzzle game: build a solid from its three views, one cube at a time, and watch each view match.
- Spatial reasoning test: five quick questions a day in the four styles used by aptitude tests, with the reason each wrong option fails.
- Cube nets: fold a net in your head and pick the cube it makes.
- Counting cubes: count every cube in a stack, hidden ones included.
- Mental rotation: the same shape turned, or its mirror image?
What makes these puzzles different
Every puzzle is built by our own generator and checked by computer before it is published, so each one has exactly one answer you can reach by reasoning, with no guessing. The 3D puzzles follow the same rules as the book THINK IN 3D, including its left side view and the rule that anything the views cannot show is solid. Train Tracks puzzles are graded by the techniques they need, so the level tells you what kind of thinking to expect.
Free, with no account
Everything here is free to play. Scores and streaks stay in your own browser. If you prefer paper, there are free printable PDFs for 3D puzzles and Train Tracks, and the puzzle books cover murder mystery logic and mystery coloring too.