Colourful puzzles, quick maths and a quiz to test your general knowledge. No sign-up, and it works on your phone.
Classic puzzles where every digit has its own colour. Four difficulty levels, notes, hints and best times.
Play SudokuSixty seconds of mental maths. Add, subtract, multiply, divide and work out percentages, as fast as you can.
Start sprintingTen questions from science, history, sport, everyday life and maths. Fifteen seconds to answer each one.
Take the quizShort puzzles and quizzes are a pleasant way to take a break and keep your thinking sharp. Sudoku trains logic and patience, mental maths builds speed and confidence with numbers, and a quiz is a fun way to learn something new. Each game here takes only a few minutes.
Read our how to play guide and solving strategies, or find out where Sudoku came from.