Keyword | CPC | PCC | Volume | Score |
---|---|---|---|---|
free printable hard sudoku puzzles pdf | 1.51 | 0.5 | 5625 | 19 |
free printable hard sudoku puzzles for adults | 0.08 | 0.3 | 436 | 55 |
free printable hard sudoku puzzles | 0.28 | 1 | 5453 | 64 |
free printable hard sudoku puzzles 4 per page | 0.92 | 0.8 | 2347 | 31 |