Tuesday, March 17, 2009

42

42 = 2 x 3 x 7.

42 is a Catalan number.

42 lies between a twin prime pair: 41, 43.

42 is the number of spots on a pair of dice.

42 is 101010 in base 2 (binary).

42 has a unique representation as a sum of three squares: 42 = 12 + 42 + 52.


Douglas Adams used 42 as "the answer to the ultimate question of life, the universe, and everything" in his Hitchhiker's Guide to the Galaxy series.

Source: Number Gossip
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