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Play Math Mosaic (Calcdoku) online: rules and tips

Previously: Calcdoku

Fill every row and column while solving the arithmetic cages. Explore the rules below, then practise Math Mosaic in the HubbardGames Library.

An account is needed to play and save your progress.

Fill every row and column while solving the arithmetic cages.

How to play Math Mosaic

  • Use 1 up to the grid size exactly once in every row and every column. The fine grey grid shows those rows and columns.
  • Each coloured outline is one calculation cage. Its matching coloured target must be made using the shown operation. A 6× cage might contain 2 and 3.
  • For subtraction and division, either order is allowed. Tap a cell and then a number; use Notes to keep several possibilities.

Your first useful move

Use the arithmetic target together with the row and column restrictions. A product cage can rule out numbers that are not factors of its target before any cell is filled.

Playing on HubbardGames

Open a Library board to find this game’s controls. The how-to-play button keeps the rules close by while you solve, so you can check a detail without leaving the puzzle.

Choose your difficulty

The Library shows the available difficulty levels for this game. Choose a board that suits you, then return for another when you want more practice.

Can I practise without affecting the league?

Yes. Choose a puzzle from the Library to practise this game. Library practice does not add league points. You can return to an unfinished puzzle later.

Find your next favourite

More puzzles to explore