PlaySudoku.us
Expert · Puzzle #559
7
2
6
9
1
4
4
3
5
8
1
9
6
5
8
3
6
4
3
2
4
5
8
7
"An investment in knowledge pays the best interest." — Benjamin Franklin
"An investment in knowledge pays the best interest." — Benjamin Franklin
"The book of nature is written in the language of mathematics." — Galileo Galilei
"The book of nature is written in the language of mathematics." — Galileo Galilei