अनुबाद - अंग्रेजी-युनानेली - It's like puzzle solving.

That's the literal translation.

Σαν να λύνεις ένα δύσκολο πρόβλημα is an alternative
Συναρμολογείς can also be used although it actually means "putting the pieces of the puzzle together"

Note that you can use or not use "ένα" in this case without really changing the meaning.

चिठ्ठीको सङ्ख्या: 4

चिठ्ठीको सङ्ख्या: 4

चिठ्ठीको सङ्ख्या: 4

चिठ्ठीको सङ्ख्या: 4