One of the largest Rubik’s Cubes created, the 5x5 promises to push your problem-solving capacity. Known as the Professor’s Cube due to the sheer difficulty to complete it! This Rubik’s Cube features six different colored sides, each made up of 25 squares. Once the faces are jumbled up, you are going to need to twist, turn and rotate the puzzle until each of the six faces has only one colour. Seems nearly impossible, right?