Mathematics and infelidty are both easy words. The only words that are difficult to type quickly are uncommon words (because you don't recognize them immediately), words that rely mainly on one hand (secretary) or more on just a couple of fingers on one hand, or words that are misspelled. I had a typing test that was taken from Huck Finn. It was incredibly difficult, as almost all the words were spelled incorretly.

What is it they say about silence being golden?