The Number of the Day: 20
Using computers they borrowed from Google, an international team of mathematicians has discovered that every Rubik's Cube can be solved in 20 moves or less.
Related Fact: 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.
[Source: Yahoo! Games. See previous Numbers of the Day here.]