: Ensure the solution book matches the year of your textbook (e.g., 2009 vs. 2015) as task numbers sometimes change.

: You can find the PDF version or view solutions online on Mirege.ru .

: Be sure to distinguish between the Basic (Базовый) and Advanced/Profile (Углубленный/Профильный) levels, as the tasks differ significantly.

: Additional materials like independent works by Alexandrova (which complement the Mordkovich curriculum) can be accessed on Kop.ru . Quick Tips for Finding Solutions:

: For the standard 11th-grade problem set (often co-authored with Denishcheva and others under Mordkovich's editorship), detailed step-by-step solutions are available on GDZ.ru and Skysmart .