CalcuDoku is a HTML5 game where you have to fill in the grid so that every row and every column contains the digits. Each box must also be calculated according to number and operator, there is only 1 solution for each puzzle. CalcuDoku, HTML5 game, number puzzle, math game, logic puzzle, brain teaser, arithmetic, grid filling, calculation, Sudoku, hypercasual game, mobile game, math challenge, puzzle game, online game, number game, operators, 1 to 9, single solution, mental workout