1,000 + Calcudoku sudoku 7x7

Positive brain awesome game. Suitable for adults and children. 6 puzzles per page. 500 CalcuDoku sudoku puzzles 7x7 easy levels. 502 CalcuDoku sudoku puzzles 7x7 medium levels. Thick paper. Glossy cover. Calcudoku sudoku puzzles - is a mathematical and logical puzzle. It is necessary to fill the grid with numbers so that in each row and in each column they are not repeated. The number in the corner of each selected block is the result of an arithmetic operation on the numbers in this block ( addition, subtraction, multiplication, division). Unlike killer sudoku (sum-do-ku), the numbers inside the block can be repeated. I hope you enjoy these puzzles. Best regards, Basford Holmes