You know who sucks at maths? Almost everyone, that's who. Newsflash: the majority of humans do not do math because they love and excel at it. We mostly dislike it and are bad at it to boot.
That's the gist of Teri Oda's refreshingly succinct (and funny!) slideshow, which explains that gender does not predict who has mad maths skills. Watch, and stop saying females suck at maths. Please just stop. [Slideshare/Teri Oda]