They baffle, delight, and frustrate millions of people around the world on a daily basis. But even the most dedicated Sudoku-solver might have never spotted this secret pattern. Mathematicians have ...

This optical illusion can only be solved by the sharpest minds in under 9 seconds. All you have to do is count all the squares hidden in the image. But don’t get too cocky, because whilst this puzzle ...

If you have been on Facebook at all over the last year, you have probably seen the "puzzle" where there is a grid, and the question reads "How many squares do you see?" Some people (clearly not ...