Calcura - Calcudoku

Calcura is calcudoku — a number grid where arithmetic does the work.

Fill the grid so each row and each column contains every number exactly once. Then make each outlined cage reach its target using the operation shown: add, subtract, multiply or divide.

• Three sizes — 4×4, 5×5 and 6×6
• Every puzzle is generated fresh and verified to have exactly one solution
• Your time is recorded, with the ten best times kept per size
• Five mistakes end the puzzle — try the same one again or start a new one
• Leave mid-puzzle and pick it up later, exactly where you left off
• A built-in tutorial fills in a small grid step by step
• Works fully offline

Light arithmetic, real logic. No account, no sign-up.