Rubiks Cube looks down over the crowd of participants
A massive Rubik's Cube looks down over the crowd of participants at the National Rubik's Cube Championship, at Liberty Science Center in Jersey City, New Jersey, United States. The Rubik's Cube was invented in 1974 by Erno Rubik. Now it is said to be the best-selling puzzle and toy in the world. Eduardo Munoz/Reuters
Participants practice before competing
Participants practice before competing. Contestants must provide their own Rubik's Cubes, which cannot be modified or damaged, to prevent cheating. Eduardo Munoz/Reuters
Participants compete at the National Rubiks Cube Championship.
Participants competing at the National Rubik's Cube Championship. Before attempting to solve a cube, a 'scrambler' randomises its sides by following computer-generated instructions. Eduardo Munoz/Reuters
Participant celebrates during the National Rubiks Cube Championship
A successful participant celebrates during the championship. In 2011 Australian Feliks Zemdegs earned the world record for the fastest average time to solve Rubik's Cubes during a competition. His time is just 7.87 seconds. Eduardo Munoz/Reuters
The Worlds Most Expensive Rubiks Cube
A girl looks at the world's most expensive Rubik's Cube, which was on display during the championship. Made by Diamond Cutters, the cube is made from 18-carat yellow gold encrusted with 25 diamonds, emeralds and rubies. The cube, made to mark the Rubik's Cube's 40th anniversary is valued at $2.5 million. Eduardo Muno/Reuters
Speed cube champion Anthony Brooks
Speed cube champion Anthony Brooks after breaking the Guinness World Records title for "Most Cubes Solved Underwater In One Breath" at the National Rubik's Cube Championship. Brooks solved five Rubik's cubes in one breath. Eduardo Munoz/Reuters
Volunteer Dressed as Rubiks Cube
A volunteer dressed as a Rubik's Cube at the championship. Eduardo Munoz/Reuters