5 Logic Games That Improve Critical Thinking
Five logic games that actually train critical thinking — deduction, pattern recognition, and planning. Free to play, no download needed.
Blog
Tips, strategies and mental-math tricks for the games on this site — and notes on what's new.
How to Solve Sudoku Faster: 4 Real Techniques (No Guessing)
Four genuine Sudoku deduction techniques — naked singles, hidden singles, pointing pairs, and box-line reduction — explained with real examples, no guessing required.
5 Mental Math Tricks That Actually Speed You Up
Five arithmetic shortcuts you can start using today — multiplying by 9 and 11, squaring numbers ending in 5, and more — plus games to drill each one.