I understand you're looking for a deep essay covering (Malayalam for "tricky questions" or "riddles") along with a PDF link to the questions and answers.
“Oru kilivathilil ninnu nirathu kulirnjittu varunna vasthu enthu?” (What comes out of a fridge cold?) 101 kusruthi chodyangal and answers pdf link
This platform hosts several multi-page documents like Kusruthi Chodyangal 2023 and older collections that can be downloaded as PDF or TXT files . I understand you're looking for a deep essay