2
6
5
8
3
8
7
6
1
9
4
8
7
5
6
9
7
8
2
3
6
9
6
2
3
1
1
4
7
5
6
3
2
4
7
8
3
More than 100 million Sudoku puzzles are estimated to be printed in newspapers worldwide each day.
More than 100 million Sudoku puzzles are estimated to be printed in newspapers worldwide each day.
In Japan, Sudoku is most popular among office workers and is often solved during commutes on trains.
In Japan, Sudoku is most popular among office workers and is often solved during commutes on trains.