Puzzle

головоло́мка

golovolómka

(game or toy, or problem, requiring some effort to complete or work out, which is intended as a pastime and/or to test one’s mental ability)

зага́дка

zagádka

(thing which is difficult to make sense of or understand)

затрудне́ние

zatrudnénije

(thing which is difficult to make sense of or understand)

пазл

pazl

(game or toy, or problem, requiring some effort to complete or work out, which is intended as a pastime and/or to test one’s mental ability)