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http://www.exploratorium.edu/ronh/age/ Looking at the numbers above, you'll immediately notice that you are different ages on the different planets. This brings up the question of how we define the time intervals we measure. What is a day?

Your Age on Other Worlds | Exploratorium - StumbleUpon

http://www.phy.duke.edu/~rgb/Philosophy/axioms/axioms/axioms.html Contents Contents | rgb Home | Philosophy Home | Axioms | Other Books by rgb: | The Book of Lilith | Axioms is a work that explores the true nature of human knowledge, in particular the fundamental nature of deductive and inductive reasoning.

axioms - StumbleUpon

Nerd Paradise : Divisibility Rules for Arbitrary Divisors

It's rather obvious when a number is divisible by 2 or 5, and some of you probably know how to tell if a number is divisible by 3, but it is possible to figure out the division 'rule' for any number. Here are the rules for 2 through 11... http://www.nerdparadise.com/math/tricks/divisorrules/