What is the antonym of the word 'Conundrum'?

Conundrum (noun)
English Meaning: A problem that is difficult to deal with.
Bangla Meaning: কঠিন প্রশ্ন; বাধা।

Synonyms: Problem (সমস্যা; জটিলপ্রশ্ন), mystery (অস্পষ্টতা; রহস্যময়তা), quandary (দ্বিধা; কিংকর্তব্যবিমূঢ়তা).
Antonyms: Obviousness (সুস্পষ্টতা).
 
Example Sentence: Arranging childcare over the school holidays can be a real conundrum for working parents.

Source: Lecture