PlaySudoku.us
Expert · Puzzle #420
8
1
9
9
2
4
1
4
9
8
5
3
7
4
9
6
3
5
1
8
4
5
7
3
2
Retired people who solve puzzles daily have been shown in multiple studies to score higher on memory tests than non-puzzlers of the same age.
Retired people who solve puzzles daily have been shown in multiple studies to score higher on memory tests than non-puzzlers of the same age.
"There is no royal road to geometry." — Euclid
"There is no royal road to geometry." — Euclid