Maths brain teasers are a great way to boost your cognitive thinking and exercise your brain muscles. Solving puzzles ...

Nenad Lukic's Puzzlip generates free online puzzles. It divides an uploaded image into a grid and randomly rotates the squares. Click the squares to rotate them. It's funny because the copy describes ...

But then there's 83-year-old Helene Wendling, who just revealed the 60,000-piece puzzle she put together over a year and a ...