Start by choosing how big your puzzle will be. Larger puzzles tend to be more challenging and take longer to complete

Choose which operations you want to include in your puzzle. Some limitations will apply depending on the number sets used.

Decide which number set you want to work with and then click on the 'Generate Puzzle' button.

The outlined shapes are called cages. Each cage has a target number and associated math operation. Each operation is associated with a colour. One or more smaller cages can be contained within a larger one.

Touch a space within a cage to make it active. Once active, you can assign a number to it. You can also undo, redo, or erase what you assigned.

Each space must be filled with numbers that, combined in any order, to produce the target number found on the top left corner of the primary cage using the correspondent math operations.

Numbers may not be repeated in any row or column. Just like Sodoku!

Numbers might be repeated in the same cage as long as they are not in the same row or column.

Use notes to work out the various solutions to a cage. These can be swapped in and out of a current puzzle.