This puzzle, a fine addition to the world of brain teasers, dares you to uncover the numerical values of various shapes. It's ...

In 1907, the English author and mathematician Henry Ernest Dudeney posed a puzzle: Can any equilateral triangle be cut into ...

Henry Ernest Dudeney posed the famous dissection problem of transforming a triangle into a square by cutting it into as few ...

Optical illusions challenge our perception, and today’s test is no different! A tricky visual puzzle asks you to spot the ...