If you need the complete set for the school year, they are quite affordable (often under 300 RUB) at major retailers:
If you just need to check specific answers or sections, some digital archives host copies for online viewing: If you need the complete set for the
: You can view a PDF fragment of the 3rd edition (Part 1), which includes actual test questions on spelling and grammar. If you need the complete set for the
: A similar fragment for Part 2 covers topics like adverbs and their meanings. If you need the complete set for the