PlaySudoku.us
Expert · Puzzle #536
2
6
2
8
4
7
3
9
7
9
4
2
5
2
3
8
2
7
1
1
3
4
6
7
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