You mean the math is intentionally "scaled up"? Or that the math is just easier & there is no effort made to rescale it? Given that these scores are used for comparison so often, you'd think they would normalize the scores so that a 700 means the same thing on both sections.

For what it's worth, this is a trend on other standardized tests as well (including the SAT).

The vocab is really obscure and even if you know a lot more words than the average person, you still get bitten. The only answer is to study very hard on a nearly completely useless subject.