Authentic texts, published as an upper bound
The texts are drawn from newspapers, magazines and books — informational and factographic, or narrative and descriptive with elements of reasoning. Their length is published as a bound per text rather than as a paper total, which is why this page states no total word count. Reading real published Russian, rather than graded classroom prose, is therefore not optional preparation: it is the exam.
Because every item is single-choice, the paper does not ask you to produce anything — but it does ask you to distinguish between options that are all plausible if you only half-understood the paragraph. That is a comprehension test disguised as a recognition test, and the way to pass it is to actually understand rather than to recognise familiar words.