The Chinese Que Jianyu has managed to beat his own world record in solving 3 Rubik’s cubes while juggling them. You can see in the video how he is solving one by one making movements in the short time he has them in his hands. Slow motion is necessary to see what is happening.
A Rubik’s Cube has 3 pieces wide, so it is called 3×3 Rubik’s Cube. The Rubik’s Cube record is only 5.55 seconds. There are other well-known cubes with more pieces per side as 4×4 and 5×5 cubes. The number of parts and the number of moves needed to solve them increase, also increasing the number of seconds required to solve them (22 and 48 seconds, respectively).
A few years ago they managed to create the first 6×6 and 7×7 Rubik’s cubes. And some time later they became official categories in Rubik’s Cube competitions. Their records are 1:40 and 2:38, respectively.
All these cubes are small, even tiny, compared with 17×17 Rubik’s Cube, the most complicated Rubik’s cube in the world. With 1734 stickers, it is not easy to solve. However, Kenneth Brandon has been able to solve it in 7 and a half hours!!
You can watch the full video (nearly eight hours duration).