PlaySudoku.us
Medium · Puzzle #420
3
1
2
9
6
2
3
1
7
2
5
3
9
4
5
3
9
8
7
3
6
2
7
4
3
3
4
5
2
4
5
6
3
7
9
"To know what you know and what you do not know — that is true knowledge." — Confucius
"To know what you know and what you do not know — that is true knowledge." — Confucius
"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them." — William Lawrence Bragg
"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them." — William Lawrence Bragg