They allow students to verify their work independently without a teacher.
Many educators argue that over-reliance on these manuals leads to simple copying rather than understanding the underlying mathematical logic.
Search terms like "onlajn otvety" indicate that students frequently look for these answers on educational portals to self-correct their work or view step-by-step solutions for complex geometry and algebra problems. Role of "Reshebniks" in Russian Education
Edited by F.F. Lysenko, a prominent author of Russian educational materials for math and physics.
If you are looking for specific solutions, modern versions of these materials are often shared via educational YouTube channels or telegram groups for current OGE/EGE prep.
Because the GIA (now OGE) includes both multiple-choice and open-ended "Part 2" problems, detailed manuals are often the only way for students to see the formatting required to earn full points from examiners.