The fastest anyone has solved a Rubik's Cube blindfolded is 30.94 seconds. Haiyan Zhuang of China set this record at the Xi'an Spring 2010 Rubik's Cube competition.

Related Fact: The world record for solving a Rubik's Cube with your feet? 36.72 seconds, by Anssi Vanhalla of Finland.

[Source: World Cube Association. See previous Numbers of the Day here.]