The official textbook includes answers to quantitative problems at the back. Try to reach that number on your own first!
Communities on platforms like VK (GDZ.wiki) often discuss specific exercises from the 10th-grade book. gdz po fizike markovicha i zhilko
While "copy-pasting" answers won't help you pass the Centralized Testing (CT), using a correctly can be a powerful learning tool: gdz po fizike markovicha i zhilko
Сборник задач по физике. 10—11 классы - Google Books gdz po fizike markovicha i zhilko
For the toughest chapters like rotational motion or electrodynamics, seeing a worked example can clarify difficult formulas.
Since these authors follow the official curriculum, their problems are the closest you'll get to actual exam questions.