Fill each row and column with numbers 1 to N without repeats, while satisfying the arithmetic constraint in each cage (bold-bordered group).
How to Play
Tap an empty cell to select it.
Use the number keypad to enter a value.
Each cage shows a target number and operation in its top-left corner.
Cage Rule
The numbers in a cage must combine using the given operation (+, −, ×, ÷) to produce the target value.
Row / Column Rule
No number may appear more than once in the same row or column.
Completed Example
Each row and column contains numbers 1 to N exactly once.
Numbers in a cage must produce the target using the specified operation.
Single-cell cages show the answer directly.
Tip
Start with single-cell cages to lock in certain numbers first.
Check which numbers are already placed in a row or column to narrow candidates.
Use memo mode to note possible candidates in each cell and avoid mistakes.
Math Sudoku simultaneously trains arithmetic fluency and logical reasoning. Tracking multiple constraints engages working memory under significant cognitive load.
Miyake et al. (2000) - Unity and diversity of executive functions
Noro & Noro (2012) - Arithmetic puzzles and mathematical reasoning