CalcuDoku Puzzles Mixed - 200 Master Puzzles vol.4 (Paperback). This item is unavailable.CalcuDoku Puzzles Mixed - 200 Master Puzzles vol.4 (Paperback)

Paperback. Each puzzle consists of a grid containing blocks surrounded by bold lines. The object is to fill all empty squares so that the numbers 1 to N (where N is the number of rows or columns in the grid) appear exactly once in each row and column and the numbers in each block produce the result shown in the top-left corner of the block according to the math operation appearing on the top of the grid. In CalcuDoku a number may be used more than once in the same block. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.