3
2
8
1
9
4
1
9
5
8
2
3
5
2
6
7
6
2
8
7
4
5
4
6
5
3
1
6
5
9
5
4
8
6
3
"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
Look for digits that already appear 7 or 8 times on the board — they're the easiest to place last.
Look for digits that already appear 7 or 8 times on the board — they're the easiest to place last.