NEW
Mental Math Trainer
Timed mental arithmetic drills for addition, subtraction, multiplication and division with difficulty, operation type and per-question time limits
NEW
Binary Practice
Four-mode binary conversion drills - binary to decimal, decimal to binary, bit-flipping challenge and quick conversion - with bit-weight visualisation
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Number Memory Test
Flash a number, recall it from memory. Digit length adapts to your accuracy, with stats for accuracy, average response time and best streak
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Sudoku Online
Play sudoku online with four difficulty levels, pencil-mark notes, hints, error checking and full solution, all keyboard accessible
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Sliding Puzzle
The classic sliding tile puzzle from 3x3 up to 6x6, always solvable thanks to inversion-parity checking, with arrow-key controls and hints
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Prime Number Game
Click every prime number in the grid within 60 seconds - correct picks score points, mistakes cost you - and sharpen your number sense
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Memory Matching Game
A flip-and-match memory game with up to 20 number pairs across four difficulty levels, tracking your time and number of attempts
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Number Swap Puzzle
Sliding number puzzle from 3x3 to 5x5 with three shuffle intensities, best-time records and hints for misplaced tiles
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