Mathematics

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Weierstrass functions are famous for being continuous everywhere, but differentiable "nowhere". Here is an example of one: It is not hard to show that this series converges for all x . In fact, it is absolutely convergent . http://www.math.washington.edu/~conroy/general/weierstrass/weier.htm

Weierstrass functions

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... The last digit is divisible by 2.

Nerd Paradise : Divisibility Rules for Arbitrary Divisors

http://www.nerdparadise.com/math/tricks/divisorrules/
Every time I hear someone say "I suck at math," I immediately think he or she is a moron.

Math doesn't suck, you do.

http://www.thebestpageintheuniverse.net/c.cgi?u=math/