While there is no single "official" GDZ portal for Dudnikov as there is for standard school textbooks (like those by Goltsova or Rozental), solutions can often be found through the following platforms:
Deep dives into parts of speech (Nouns, Verbs, Participles, etc.). gdz po russkomu jazyku dudnikov
To find a specific answer, it is most effective to search for the of the exercise prompt in quotes. For example: Дудник "текст упражнения..." While there is no single "official" GDZ portal
You can often find the full textbook (with answer keys in the back for some editions) on Twirpx or similar educational repositories. Standard Content Structure Standard Content Structure Various styles of speech (formal,
Various styles of speech (formal, scientific, colloquial). How to Find Specific Solutions
Sites like Znayka or Gdz-putina occasionally host user-uploaded solutions for specific editions.
Roots, suffixes, and how words are built.