This puzzle consists of 20 numbered round pieces in one long looped track. You can slide all the pieces around the loop, or use the turntable in the loop (this is the purple circle which contains ...

The classic sliding block puzzle. The 15-puzzle consists of a 4-by-4 grid with tile numbered $1$ to $15$ placed in the grid. The object of this puzzle is to randomly ...

Solving mathematical puzzles daily can greatly improve your problem-solving skills. It not only exercises your brain but also ...